C406-2 SERIES
EMERGENCY LOCATOR TRANSMITTER
Description, Operation, Installation and Maintenance Manual
This manual includes data for the equipment that follows:
Component
Emergency Locator Transmitter 453-5000 C406-2
Emergency Locator Transmitter 453-5001 C406-2HM
Part No. Model No.
ACR ELECTRONICS, INC / ARTEX PRODUCTS
5757 Ravenswood Rd, Ft. Lauderdale, FL 33312
25-62-11
Cage Code: 18560
Page 1 of 87
JUN 20/13
570-5000 Rev. G
Initial Issue JUN 30/1999
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
PROPRIETARY INFORMATION
This document contains proprietary information and such information may not be disclosed to others for any
purpose, nor used for manufacturing purposes without written permission from ACR Electronics.
Information in this manual is subject to change without notice. ACR Electronics makes no warranty, expressed
or implied, with regard to this manual, including but not limited to any implied warranties of merchantability,
fitness for a particular purpose, and non-infringement. In addition, ACR Electronics makes no warranty with
regard to the documentation or data contained herein. ACR Electronics is not liable in the event of incidentals,
special, consequential, or any other damages in connection with or arising from furnishing, performance, or
use of this manual.
Reproduction of this publication or any portion thereof by any means is prohibited. for further information contact Sales, ACR Electronics, 5757 Ravenswood Rd, Fort Lauderdale, FL 33312. Telephone (954) 981-3333.
AIRWORTHINESS LIMITATIONS
The Airworthiness limitations section is FAA approved and specifies inspections and other maintenance
required under 14 CFR§ 43.16 and 91.403, unless an alternative program has been approved.
IMPORTANT NOTICE
ACR Electronics will be responsible for full distribution and revisions of ICA’s (Instructions for Continued
Airworthiness) For inquiries regarding the content and currency of this manual, contact ACR Electronics,
5757 Ravenswood Rd, Fort Lauderdale, FL 33312. Telephone (954) 981-3333
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
RECORD OF REVISIONS
REV NO. DCN NO. DCN DATE REV NO. DCN NO. DCN DATE
- RELEASE Jun 30/1999
- ECO 1493 Sep 07/2000
- ECO 1523 Oct 18/2000
A DCN 1641 Apr 11/2001
A DCN 1760 Aug 01/2001
A DCN 1965 Apr 04/2002
A DCN 2115 Dec 10/2002
A DCN 2356 Feb 11/2004
A DCN 2527 Jan 20/2005
A DCN 2689 Jan 09/2006
A DCN 2888 Nov 26/2006
B DCN 2968 Mar 20/2007
B DCN 3174 Feb 26/2008
B DCN 3282 Aug 25/2008
C DCA W9414 Apr 06/2010
D ECO 14756 Jul 27/2011
E ECO 15149 Jul 31/2012
F ECO 15177 Aug 28/2012
G ECO 15410 Jun 20/2013
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
THIS IS A BLANK PAGE
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SERVICE BULLETIN LIST
SERVICE
BULLETIN NO
ISSUE
DATE
SUBJECT
MANUAL
REV NO
MANUAL
REV DATE
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C406-2 (453-5000), C406-2HM (453-5001)
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
LIST OF EFFECTIVE PAGES
SUBJECT PAGE DATE SUBJECT PAGE DATE
Title Page 1 Aug 28/12 Description and Operation 30 Aug 28/12
Notices 2 Aug 28/12 (cont.) 31 Aug 28/12
Record of Revisions 3 Aug 28/12 32 Aug 28/12
4 BLANK 33 Aug 28/12
Service Bulletin List 5 Aug 28/12 34 Aug 28/12
6 BLANK 35 Aug 28/12
List of Effective Pages 7 Aug 28/12 Test and Fault Isolation 36 Aug 28/12
8 Aug 28/12 37 Aug 28/12
Table of Contents 9 Aug 28/12 38 Aug 28/12
10 Aug 28/12 39 Aug 28/12
11 Aug 28/12 40 Aug 28/12
12 Aug 28/12 41 Aug 28/12
List of Figures 13 Aug 28/12 42 Aug 28/12
14 BLANK 43 Aug 28/12
Introduction 15 Aug 28/12 44 Aug 28/12
16 Aug 28/12 45 Aug 28/12
17 Aug 28/12 46 Aug 28/12
18 Aug 28/12 47 Aug 28/12
19 Aug 28/12 48 Aug 28/12
20 Aug 28/12 49 Aug 28/12
21 Aug 28/12 50 Aug 28/12
22 Aug 28/12 Removal 51 Aug 28/12
23 Aug 28/12 52 Aug 28/12
24 Aug 28/12 53 Aug 28/12
25 Aug 28/12 Installation 54 Aug 28/12
Description and Operation 26 Aug 28/12 55 Aug 28/12
27 Aug 28/12 56 Aug 28/12
28 Aug 28/12 57 Aug 28/12
29 Aug 28/12 58 Aug 28/12
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C406-2 (453-5000), C406-2HM (453-5001)
SUBJECT PAGE DATE SUBJECT PAGE DATE
Installation 59 Jun 20/2013 81 Aug 28/12
(cont.) 60 Aug 28/12 82 Aug 28/12
61 Aug 28/12 83 Aug 28/12
62 Aug 28/12 84 Aug 28/12
63 Aug 28/12 85 Aug 28/12
64 Aug 28/12 86 Aug 28/12
65 Aug 28/12 87 Aug 28/12
66 Aug 28/12
67 Aug 28/12
68 Aug 28/12
69 Aug 28/12
70 Aug 28/12
71 Aug 28/12
72 Aug 28/12
73 Aug 28/12
74 Aug 28/12
75 Aug 28/12
76 Aug 28/12
77 Aug 28/12
Appendix A 78 Aug 28/12
79 Aug 28/12
Illustrated Parts List 80 Aug 28/12
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TABLE OF CONTENTS
RECORD OF REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SERVICE BULLETIN LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIST OF EFFECTIVE PAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
INTRODUCTION
1. Manual Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
B. Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2. Model Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
A. C406-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B. C406-2HM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3. Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
A. C406-2 and C406-2HM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
B. Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
C. RTCA DO-160D Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 1 Environmental Categories Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4. Frequency Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
A. Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
B. Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5. List of Acronyms, Abbreviations, and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
A. Regulatory Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
B. Other Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DESCRIPTION AND OPERATION
1. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
A. Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B. Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A. Operational Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
B. Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
C. Manual Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
D. ELT Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
E. Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. Environmental and Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 2 Environmental and Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
B. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
C. Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 4 Antenna Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
TEST AND FAULT ISOLATION
1. Inspection and Test Regulatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
A. United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B. Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
C. Other Countries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2. Inspection and Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
A. Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 5 ELT Inspection and Test Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
B. Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
C. Coax Cables and Wiring Connections Inspection – Item 1 . . . . . . . . . . . . . . . . . . . . . . . . 39
D. Mounting Tray and Hardware Inspection – Item 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
E. Battery Pack Inspection – Item 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
F. G-Switch Functional Check – Item 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
G. Performance Testing Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
H. 121.5 MHz Frequency Measurement – Item 5a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
I. Audio Modulation Check – Item 5b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
J. 121.5/243.0 MHz Power Output Measurement – Item 5c . . . . . . . . . . . . . . . . . . . . . . . . . 42
K. 406 MHz Frequency Measurement – Item 5d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
L. 406 MHz Power Output Measurement – Item 5e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
M. Current Draw Test – Item 5f . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
N. Digital Message Verification – Item 5g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
O. ELT Reset Check – Item 5h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
P. Installed Transmitter Test – Item 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Q. Antenna Test – Item 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
R. Inspection and Test Documentation – Item 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3. Fault Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
A. Self-Test Error Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 6 ELT Self-Test Error Codes Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . 49
B. ELT Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 7 ELT Troubleshooting Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
REMOVAL
1. ELT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
A. ELT Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2. Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
A. Battery Pack Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3. Material or Equipment Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
A. Shipment Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
B. Return Material Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
INSTALLATION
1. Regulatory Requirements and Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
A. TSO C126, Paragraph D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
B. FAA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
C. Canada. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
D. Other Countries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
E. RTCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
2. Mounting Tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
A. Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
B. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3. Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
A. Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
B. Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
C. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4. Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
A. Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
B. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5. Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
A. Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
B. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
A. General Considerations and Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
B. Remote Switch Harness Fabrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
C. ELT 12-Pin Receptacle Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
D. Cockpit Remote Switch 9-Pin Plug Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
E. Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
F. Antenna Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
G. Cockpit Remote Switch Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
H. Remote Switch Alternate Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
I. Airframe Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
J. Buzzer Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
K. Remote Switch Final Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
7. ELT Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A. Installation and Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
B. Harness ELT Receptacle Sealing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
C. Installation Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8. Battery Pack Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
A. Battery Reinstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
B. New Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
9. Helicopter Installations - Special Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
A. Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
B. Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
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C406-2 (453-5000), C406-2HM (453-5001)
C. Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
APPENDIX A – ELT REGISTRATION
1. Background Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
A. Hex ID Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
B. Reason for Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
C. Registration Information Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
2. Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
A. Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
B. Required Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
C. Where to Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
ILLUSTRATED PARTS LIST
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
A. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B. IPL Usage Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
2. Manufacturer Name and Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
A. Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
3. Explanation of Detailed Parts List Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
A. Fig # & Item Column. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
B. Part # Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
C. Nomenclature Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
D. UPA (Units Per Assembly) Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
4. Detailed Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
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C406-2 (453-5000), C406-2HM (453-5001)
LIST OF FIGURES
Figure 1 ELT Orthogonal Axes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 2 C406-2 Series ELT and Mounting Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 3 Remote Switch Front View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 4 Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 5 Battery Pack Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 6 Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 7 ELT Operational Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 8 Performance Testing Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 9 Current Draw Test Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 10 Short and Long 406 MHz Message Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 11 ELT Removal Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 12 Battery Pack Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 13 C406-2 Series ELT Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 14 Typical Mounting Tray Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 15 Rod Antenna 110-320 and Blade Antenna 110-328-01 Outlines and Dimensions . . . . . . 59
Figure 16 Blade Antennas 110-333 and 110-337 Outlines and Dimensions . . . . . . . . . . . . . . . . . 60
Figure 17 Blade Antenna 110-337-11 Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 18 Remote Switch Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 19 Buzzer Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 20 Remote Switch Harness Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 21 Remote Switch Harness Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 22 Remote Harness Wiring at ELT End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 23 ELT Installation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 24 Battery Pack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 25 Battery Pack Retaining Screw Tightening Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 26 ELT Orthogonal Axes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure 27 Orientation of ELT for Helicopter Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Illustrated Parts List
Figure 28 C406-2 Series ELT Main Assembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 29 Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 30 Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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THIS IS A BLANK PAGE
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TASK 25-62-11-990-801
1. Manual Usage
SUBTASK 25-62-11-990-001
A. General
(1) This manual describes the operation, installation, and maintenance of the Model C406-2
Series emergency locator transmitter (ELT). This information is provided to ensure initial and
continued airworthiness. Information presented in this manual is accurate at time of printing,
but is subject to change. Refer to the Artex products web site at www.acrartex.com for the
latest information and any updates to this manual.
(2) Information on COSPAS-SARSAT emergency locator beacon registration requirements and
procedures is provided in Appendix A – ELT Registration, on page 78.
C406-2 (453-5000), C406-2HM (453-5001)
INTRODUCTION
(3) Web links provided in this manual were accurate at time of printing but may be subject to
change.
(4) ACR Electronics reserves the right to add approved components to the ELT system; including,
but not limited to antennas, remote switches, and coaxial cables.
(5) Regulatory references contained herein are generally confined to United States and Canadian
requirements and, in any case, should not be considered all encompassing. Consult your
national aviation authority for applicable requirements.
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SUBTASK 25-62-11-990-002
B. Application
(1) This manual constitutes supporting data/documentation for the C406-2 Series ELT, including:
(a) Description and Operation
(b) Test and Fault Isolation (includes inspection criteria)
(c) Removal
(d) Installation
(e) Registration
(f) Illustrated Parts List
(2) In the United States, the C406-2 Series ELT must be installed and maintained in accordance
with the requirements herein and 14 CFR, FAR Parts 43, and 91; and other airworthiness
requirements, as applicable.
(3) In Canada, the C406-2 Series ELT must be installed and maintained in accordance with the
requirements herein and Canadian Aviation Regulations (CAR), Part V, Paragraph 551.104 and
other CAR airworthiness requirements, as applicable.
C406-2 (453-5000), C406-2HM (453-5001)
(4) C406-2 Series ELT installation and maintenance in all other countries must comply with the
requirements herein and applicable national airworthiness requirements.
(5) The accessories (i.e., remote switch and antennas) addressed in this manual are the
accessories most commonly associated with the C406-2 Series ELT. Other options, such as a
different remote switch configuration or an ELT/NAV Interface, should be installed and
maintained in accordance with the written instructions specific to the accessory.
NOTE
: Contact ACR Electronics for optional accessories approved for use with a C406-2
Series ELT.
(6) To ensure proper operation, only parts listed in the Illustrated Parts List of this manual or
those recommended by ACR Electronics may be used as replacement parts for the C406-2
Series ELT.
TASK 25-62-11-990-802
2. Model Descriptions
SUBTASK 25-62-11-990-001
A. C406-2
(1) The C406-2 is a type AF (Automatic Fixed) ELT, which transmits on 121.5, 243.0, and 406
MHz.
(2) The ELT is enclosed within a multi-piece mounting frame consisting of a mounting tray,
protective top cover and mounting frame cap.
(3) When ordered as a system, an installation kit, cockpit remote switch, coax cables, audible
buzzer, and dual input antenna are provided.
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+Y
-Y
-X
+X
+Z
-Z
FWD
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-002
B. C406-2HM
(1) The C406-2HM ELT was developed for helicopter installations and features an additional 5-
axis G-Switch module, which allows the ELT to be activated in any of six axes. See Figure 1.
(2) The C406-2HM ELT is identical to the C406-2 ELT in all other aspects.
C406-2 (453-5000), C406-2HM (453-5001)
TASK 25-62-11-990-803
3. Approvals
SUBTASK 25-62-11-990-001
A. C406-2 and C406-2HM
(1) FAA TSO C126, Type AF
(a) The conditions and tests required for TSO approval of this article are minimum
performance standards. It is the responsibility of those installing this article either on or
within a specific type or class of aircraft to determine that the aircraft installation
conditions are within TSO standards. TSO articles must have separate approval for
installation in an aircraft. The article may be installed only if performed under 14 CFR
Part 43 or the applicable airworthiness requirements.
(2) Transport Canada - Type Certificate Data Sheet AP-47 Issue 2
(3) Industry Canada - Certification Number 1215873110AF
(4) JTSO-2C126
(5) COSPAS-SARSAT - Certificate No. 112 or 170
Figure 1 ELT Orthogonal Axes
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B. Battery
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
(1) The lithium battery pack used on the C406-2 Series ELT is certified under TSO C142.
SUBTASK 25-62-11-990-003
C. RTCA DO-160D Compliance
(1) DO-160D Environmental Categories: C1-BA204XRXXXXXZAZZ204BXXX
(2) The DO-160D environmental categories breakdown is detailed in Table 1 on page 19.
: LITHIUM BATTERY SAFETY CONCERNS INCLUDE THE POSSIBILITY OF FIRE, VENTING
VIOLENTLY, AND VENTING OF TOXIC GASES.
(a) The conditions and tests required for TSO approval of this battery are minimum
performance standards. It is the responsibility of those desiring to install this battery in a
specific type or class of aircraft to determine that the aircraft installation conditions are
within the TSO standards. The battery may be installed only if further evaluation by
applicant documents an acceptable installation and is approved by the Administrator.
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Table 1 Environmental Categories Breakdown
CATEGORY SECTION DESCRIPTION
C1 4.0 Temperature/Altitude
- 4.5.4 In-Flight Loss of Cooling
B 5.0 Temperature Variation
A6.0 Humidity
204 7.0/8.0 Operational Shock and Crash Safety/Vibration
X 9.0 Explosion
R 10.0 Waterproofness
X 11.0 Fluids Susceptibility
X 12.0 Sand and Dust
X 13.0 Fungus
X 14.0 Salt Spray
X 15.0 Magnetic Effect
Z 16.0 Power Input
A 17.0 Voltage Spike
Z 18.0 Audio Frequency Susceptibility
Z 19.0 Induced Signal Susceptibility
204 20.0 Radio Frequency Susceptibility
B 21.0 Emission of RF Energy
X 22.0 Lightning
X 23.0 Lightning Direct Effects
X 24.0 Icing
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TASK 25-62-11-990-804
4. Frequency Allocations
SUBTASK 25-62-11-990-001
A. Application
(1) This section addresses the 406.0-406.1 MHz transmitter window and the specific frequency
band allocations residing above 406.025 MHz, beginning with 406.028 MHz, which are
assigned or reserved within the 406.0-406.1 MHz distress frequency window.
SUBTASK 25-62-11-990-002
B. Discussion
(1) The 406 MHz transmitter frequency of the C406-2 Series ELT was originally 406.025 MHz. In
order to comply with COSPAS-SARSAT frequency allocation requirements, changes to the 406
MHz frequency may occur since the original release of this product.
(2) While the original C406-2 Series ELTs covered by this manual transmit on 406.025 MHz,
current C406-2 Series ELTs may not. The product identification label on each ELT specifies the
transmitting frequencies of the individual ELT. The 406 MHz component may be 406.025,
406.028, 406.037 MHz, etc. Allocation of frequencies, based on beacon population per
specified frequency band, is controlled by COSPAS-SARSAT.
C406-2 (453-5000), C406-2HM (453-5001)
(3) The frequency references throughout this manual for the 406 MHz component should be
considered the baseline and the specific frequency indicated on the ELT product label should
be substituted if it differs from 406.025 MHz.
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TASK 25-62-11-990-805
5. List of Acronyms, Abbreviations, and Definitions
SUBTASK 25-62-11-990-001
Term
AC Advisory Circular – A Federal Aviation Administration (USA) bulletin
AWG American Wire Gauge – An electrical wire diameter standard. Look for
BNC CONNECTOR A very common type of coax cable connector having a 50 imped-
CAR Canadian Aviation Regulations – The rules and regulations governing
CFR Code of Federal Regulations – The general and permanent rules pub-
CONTAINER The term “Container”, within the context of this document, refers to a
Definition
with special information. For the purposes of this document, the acronym AC does not refer to electrical alternating current.
this acronym in front of or following a wire size number.
ance and used for RF signal connections.
the manufacture, certification, operation, maintenance, and alteration
of aircraft in Canada.
lished in the Federal Register by the executive departments and
agencies of the Federal Government. Title 14, “Aeronautics and
Space” contains the FARs.
device designed to suppress RF signals, such that the broadcast of an
ELT placed in the container cannot reach the SAR satellite system.
COSPAS-SARSAT The international search and rescue consortium that governs the
international satellite-based search and rescue distress alert detection
and information distribution system. For a complete description go to
the official web site for the International COSPAS-SARSAT Program.
DER Designated Engineering Representative – An individual qualified and
designated by the FAA to approve, or recommend approval, of technical data to the FAA.
DRIP LOOP Extra wire length used to form a U-shaped bend in a wire or cable.
Water or other fluids will flow down to the bottom of the loop and
drip off. Electrical connections are made at the top of the loop.
ELT Emergency Locator Transmitter – ELTs are installed on aircraft and
used to send emergency signals to the SAR satellite system. The
word “Beacon” is associated with these devices.
EMI Electromagnetic Interference – An undesirable disturbance that
affects an electrical circuit due to either electromagnetic conduction
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or electromagnetic radiation emitted from an external source. Also
called radio frequency interference or RFI.
EUROCAE European Organization for Civil Aviation Equipment – EUROCAE docu-
ments are widely referenced as a means of compliance to European
Technical Standard Orders (ETSOs) and other regulatory documents.
FAA Federal Aviation Administration – The United States government
agency for aircraft safety and regulation.
FAR Federal Aviation Regulations – The rules and regulations governing
the manufacture, certification, operation, maintenance, repair, and
alteration of aircraft in the United States.
FORM 337 FAA Form 337 is required anytime a major repair and/or major alter-
ation is performed on an aircraft. Refer to FAR, Part 43, Appendix A
and the definitions of Major Repair/Alteration contained in FAR, Part 1
for guidance.
FSDO Flight Standards District Office – FAA district offices responsible for
aircraft certification, operation, maintenance, and modification issues,
approvals and enforcement.
G-SWITCH A velocity switch that detects sudden de-acceleration and is used to
automatically activate an ELT. May also be referred to as a “crash
sensor”.
LED Light Emitting Diode – Semiconductor device that emits light when
current is passed through it. Usually used as a status or warning indicator.
MIL The three-letter acronym that stands for “Military” and proceeds mili-
tary specifications and standards numbers (e.g., MIL-W-xxxx would
indicate a wire specification and MIL-STD-xxxx would indicate a standard).
P/N Part Number – Refers to a ACR Electronics part number, unless other-
wise noted. Part numbers are also indicated with parentheses (e.g.,
XXX-XXXX).
PLUG The term “Plug”, within the context of this document, refers to the
male half of an electrical connector.
RECEPTACLE The term “Receptacle”, within the context of this document, refers to
the female half of an electrical connector.
RF Radio Frequency – The range of electromagnetic radiation that con-
stitutes the radio spectrum and corresponds to the frequency of alter-
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nating current electrical signals used to produce and detect radio
waves.
RTCA Radio Technical Commission for Aeronautics – Organization that
makes recommendations for airworthiness. Refer to http://
www.rtca.org/aboutrtca.asp for more information.
RTV A rubbery silicon-based adhesive typically used to prevent vibration
problems and water intrusion.
SAR Search and Rescue
SCREEN ROOM The term “Screen Room”, within the context of this document, refers
to a room designed to suppress RF signals, such that the broadcast of
an ELT placed in the screen room cannot reach the SAR satellite system.
SERVICE LOOP A length of wire or cable, at the connection point, of sufficient length
to allow a component to be withdrawn from its mounting position and
disconnected from its associated wiring.
TETHER A tether is a cord or similar device that anchors something movable
to a stationary point or anchors two items together, such that they
cannot become separated beyond the length of the tether.
TNC CONNECTOR A threaded version of a BNC connector.
TPS CONNECTOR A small, rugged, three-pin bayonet locking connector designed for
use when space and weight limitations are of primary concern.
TSO Technical Standard Order – A TSO is a minimum performance stan-
dard issued by the FAA for specified materials, parts, processes, and
appliances used on civil aircraft.
UTC Coordinated Universal Time – A time standard based on International
Atomic Time. UTC is the time system used in aviation and is often
associated with Greenwich Mean Time (GMT) and/or “Zulu” time.
VHF Very High Frequency – The 30 MHz to 300 MHz radio frequency band.
VSWR Voltage Standing Wave Ratio – Electrical signals will “echo” back on a
wire if load impedance is not matched to the impedance of the wire.
VSWR is a measurement of the amount of voltage being “echoed,”
compared to the original signal.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-990-806
6. References
SUBTASK 25-62-11-990-001
A. Regulatory Documents
(1) The following regulatory documents are referred to herein. When referring to such
documents, it is the manual user’s responsibility to ensure they are using the latest revision or
release of such documents. To that end, the revision designator of specific document numbers
has not been included, with the exception of the RTCA document listing, which reflects the
revision level of the documents at the time of TSO testing and certification.
(2) Except in the case of a printed manual, reference documents available on-line or source
locations are linked to applicable web sites.
(3) United States
(a) AC 43-9, “Maintenance Records”
C406-2 (453-5000), C406-2HM (453-5001)
(b) AC 43-210, “Standardized Procedures for Requesting Field Approval of Data, Major
Alterations, and Repairs”
(c) AC 43.9-1, “Instructions for Completion of FAA Form 337”
(d) AC 43-13-1, “Acceptable Methods, Techniques, and Practices – Aircraft Inspection and
Repair”
(e) AC 43.13-2, “Acceptable Methods, Techniques, and Practices - Aircraft Alterations”
(f) FAR, Part 43, “Maintenance, Preventive Maintenance, Rebuilding, and Alteration”
(g) FAR, Part 91, “General Operating and Flight Rules”
(4) Canada
(a) CAR, Part V, “Airworthiness”
(b) CAR, Part VI, “General Operating and Flight Rules”
(5) COSPAS-SARSAT
(a) C/S G.005, “Cospas-Sarsat Guidelines on 406 MHz Beacon Coding, Registration and
Type Approval”
(b) C/S S.007, “Handbook of Beacon Regulations”
(6) RTCA – The following documents are available for purchase at RTCA’s web site www.rtca.org,
or by mail:
(a) DO-160D, “Environmental Conditions and Test Procedures for Airborne Equipment”
(b) DO-178B, “Software Considerations in Airborne Systems and Equipment Certification”
(c) DO-182, “Emergency Locator Transmitter (ELT) Equipment Installation and
Performance”
(d) DO-183, “Minimal Operational Performance Standards for Emergency Locator
Transmitters - Automatic Fixed-ELT (AF), Automatic Portable-ELT (AP), Automatic
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
Deployable-ELT (AD), Survival-ELT (S) Operating on 121.5 and 243.0 MHz”
(e) DO-204, “Minimal Operational Performance Standards for 406 MHz Emergency Locator
Transmitters (ELT)”
SUBTASK 25-62-11-990-002
B. Other Documents
(1) The following documents are available on-line at the Artex products web site at
www.acrartex.com, or from ACR Electronics upon request.
(a) 570-1000, “ELT Test Set (ETS) Operation Manual”
(b) 570-4602, “ELT/NAV Interface Description, Operation, Installation and Maintenance
Manual”
C406-2 (453-5000), C406-2HM (453-5001)
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-870-801
1. Description
SUBTASK 25-62-11-870-001
A. Functional Overview
(1) The ELT automatically activates during a crash and transmits the standard sweep tone on
121.5 and 243.0 MHz. Approximately every 50 seconds, for up to 520 milliseconds (long
message protocol), the 406 MHz transmitter turns on. During that time, an encoded digital
message is sent to the COSPAS-SARSAT Search and Rescue (SAR) satellite system.
(2) The information contained in the message includes:
(a) Serial number assigned to the ELT by the beacon manufacturer or the national beacon
registration authority, or
C406-2 (453-5000), C406-2HM (453-5001)
DESCRIPTION AND OPERATION
(b) Aircraft identification or registration number, and
(c) Country of registration and country code; plus
(d) Position coordinates, when coupled with an ELT/NAV Interface (453-6500). Refer to the
ELT/NAV Interface Abbreviated Component Maintenance Manual (570-4602) for a
detailed discussion of the interaction between the ELT, ELT/NAV Interface, and aircraft
navigation system.
(3) The 406 MHz transmitter will operate for 24 hours and then shuts down automatically. The
121.5/243.0 transmitter will continue to operate until the batteries are exhausted, which is at
least 50 hours.
(4) The 406 MHz transmitter produces a much more accurate position, typically 3 kilometers as
compared with 15 to 20 kilometers for 121.5/243.0 MHz transmitters. When coupled to the
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
aircraft navigation system via the ELT/NAV Interface, the accuracy improves to approximately
100 meters.
(5) The ELT transmits a digital message that allows search and rescue authorities to contact the
owner/operator of the aircraft through information contained in a database. Information
contained in the database includes:
(a) Type of aircraft and aircraft registration number,
(b) Owner address and telephone number, and
(c) Alternate emergency contact.
(6) After the ELT is activated and the 406 MHz signal is detected by the SAR satellite system and
a position is calculated, the 121.5/243.0 MHz transmissions are used to home in on the crash
site.
NOTE
: Effective February 1, 2009, COSPAS-SARSAT has terminated satellite processing of
distress signals from 121.5 and 243.0 MHz beacons.
(7) Aircraft communications transceivers are not capable of receiving 406 MHz transmissions;
therefore, the only methods of monitoring the ELT are:
(a) The blinking cockpit remote switch LED,
(b) The buzzer, or
(c) 121.5/243.0 MHz transmissions, which can be monitored using the aircraft
communications transceiver or an AM radio tuned to 121.5 MHz.
SUBTASK 25-62-11-870-002
B. Components
(1) The C406-2 Series ELT main assembly is housed in a high impact, fire resistant, polycarbonate
plastic case, which is enclosed in a protective mounting frame assembly made of similar
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PROTECTIVE TOP
COVER ASSY
MOUNTING FRAME
CAP ASSY
ELT MAIN
ASSEMBLY
MOUNTING
TRAY ASSY
REMOTE
SWITCH
CONNECTOR
CONTROL
SWITCH
ANTENNA BNC
CONNECTOR
A
A
ANTENNA TPS
CONNECTOR
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
material. See Figure 2.
NOTE
: The ELT main assembly and its mounting frame assembly are capable of
withstanding extremely harsh environments and have been subjected to the rigorous
environmental testing required by COSPAS-SARSAT for certification.
Figure 2 C406-2 Series ELT and Mounting Frame Assembly
(2) The cockpit-mounted remote switch assembly is comprised of an ELT status LED and control
switch and allows an operator to manually turn the ELT on (i.e., activate) for testing and reset
(i.e., deactivate) the ELT. See Figure 3.
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ARTEX
ON
ARM
Press ON
Wait 1 Second
Press ARM
EMERGENCY USE ONLY
Test/Reset
ELT
LED
SWITCH
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
NOTE: The ELT CANNOT be disarmed or disabled from the cockpit. Cockpit operation is
limited to deactivating or manually activating the ELT.
Figure 3 Remote Switch Front View
(3) The buzzer (i.e., horn) provides an audible alert when the ELT is active. See Figure 4.
Figure 4 Buzzer
(4) The battery pack for the C406-2 Series ELT consists of four “D” size lithium manganese
dioxide cells connected in series. To prevent the cells from being charged, diodes are
connected across each cell and fuses are connected to the output. See Figure 5.
Figure 5 Battery Pack Assembly
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110-320
110-328-01
110-333
110-337 110-337-11
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(5) Five dual-input antennas are approved for use with the C406-2 Series ELT. Selection of the
proper antenna is dependent upon end use, aircraft configuration and speed, and other
factors. See Figure 6.
Figure 6 Antennas
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ELT
“INACTIVE”
ELT “ACTIVE”
BUZZER “ON”
LED “ON”
ELT
SWITCH
“ON”
REMOTE
SWITCH
“ON”
G-SWITCH
“ON”
ELT OR
REMOTE SW
“RESET”
YES
YES
NO
NO
NO
YES
NO
YES
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-870-802
2. Operation
SUBTASK 25-62-11-870-001
A. Operational Overview
(1) See Figure 7.
C406-2 (453-5000), C406-2HM (453-5001)
Figure 7 ELT Operational Flow Diagram
(2) A primary feature of the C406-2 Series ELT is its simplicity of operation. As long as the ELT is
connected to the remote switch harness ELT connector, such that pins 5 and 8 are jumpered
(G-switch loop), it will activate in the event of a crash.
NOTE
(3) ELT operation is designed to prevent human error and misuse in regards to automatic
: Neither the cockpit remote switch or the ELT local switch can be positioned in such a
manner as to prevent automatic activation when the ELT is connected properly.
activation. The ELT cannot be activated by dropping, rough handling or during shipping.
(4) When the ELT is activated, the presence of the emergency sweep tone and the flashing
cockpit remote switch panel LED indicates an active, normal functioning ELT. The cockpit
panel LED must immediately begin to flash continuously upon ELT activation.
(5) The ELT is considered to be either “ACTIVE” or “INACTIVE”. When “INACTIVE”, the ELT is in a
state of rest and performs no functions. Taking the ELT from the “INACTIVE” state to the
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
“ACTIVE” state requires a positive switch transition from either the cockpit remote switch, ELT
local switch, or G-switch.
(a) It is possible the primary G-switch or one of the auxiliary G-switches could activate the
ELT in either a fixed or rotor wing aircraft as the result of severe maneuvers or a very
hard landing.
(b) To take the ELT from an “ACTIVE” state back to an “INACTIVE” state, a “RESET” must
occur. See SUBTASK 25-62-11-870-004.
(6) A warning buzzer is required under C126 TSO approval. The buzzer is powered by the ELT and
therefore not dependent upon the aircraft battery for operation. It is not designed to operate
continuously, but sounds at predetermined intervals and runs for shorter periods toward the
end of ELT battery life.
SUBTASK 25-62-11-870-002
B. Normal Operation
(1) The cockpit remote switch is in the “ARM” position (i.e., down).
C406-2 (453-5000), C406-2HM (453-5001)
(2) The local switch on the ELT is in the “OFF” position (i.e., down).
SUBTASK 25-62-11-870-003
C. Manual Activation
(1) The ELT may be manually activated by placing either the remote switch or the ELT local
switch in the “ON” position.
NOTE
: As long as the cockpit remote switch and the ELT local switch are in the ARM/OFF
positions respectively, the ELT will automatically activate on impact.
SUBTASK 25-62-11-870-004
D. ELT Reset
(1) If the ELT is activated accidently, it will need to be reset.
(2) Reset the ELT from the cockpit by moving the remote switch to the “ON” position, waiting
approximately one second, and then moving it back to the “ARM” position. If the switch is
already in the “ON” position, move it to the “ARM” position.
(3) Reset the ELT locally by moving the switch on the ELT to the “ON” position, waiting
approximately one second, and then moving it back to the “OFF” position. If the switch is
already in the “ON” position, move it to the “OFF” position.
NOTE
: The ELT cannot be reset if either the cockpit remote switch or the ELT local switch is
in the “ON” position.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-750-001
E. Functional Check
(1) A monthly functional check is recommended to verify operational status of the ELT.
(2) Perform this functional check in accordance with SUBTASK 25-62-11-750-011 on page 47.
TASK 25-62-11-870-803
3. Specifications
SUBTASK 25-62-11-870-001
A. Environmental and Physical
(1) Table 2 lists the environmental and physical specifications of the C406-2 Series ELT.
NOTE
: For automatic activation, the higher threshold of 4.5 ft/sec (2.3 g) is specified in
accordance with Eurocae ED-62. Use of the higher threshold crash sensor has been
approved by the FAA as a deviation to TSO C126 (FAA Reference #98-130S-108,
February 6, 1998).
C406-2 (453-5000), C406-2HM (453-5001)
Table 2 Environmental and Physical Specifications
CRITERIA PARAMETER CHARACTERISTIC
Temperature
Mechanical
Automatic Activation
(Auxiliary Five G-Switches)
Storage -55° C to +85° C
Operating -20° C to +55° C
Vibration 10
Shock 500
Crashworthiness 100
Humidity 95% for 50 hours
Penetration 55 lbs from 6 in. (25 kg from 15 cm)
Crush 1,000 lbs (454 kg)
Altitude 55,000 ft (16,764 m)
C406-2 Series
(Primary G-Switch)
C-406-2HM
g
, 5 Hz to 2,000 Hz
g
for 4 ms
g
for 23 ms
4.5 ±0.5 ft/sec (2.3
12
g
)
g
Weight
Dimensions (LxHxW)
Software In accordance with RTCA/DO-178B, Level D
ELT Complete w/Battery Pack,
Mounting Tray, and Covers
ELT Complete w/Battery Pack,
Mounting Tray, and Covers
25-62-11
4.25 lbs (1.9 kg)
11.63 x 3.90 x 3.76 in.
(295 x 99 x 96 mm)
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-870-002
B. Electrical
(1) Table 3 lists the electrical specifications of the C406-2 Series ELT.
CRITERIA PARAMETER CHARACTERISTIC
Operating Frequencies
Modulation
C406-2 (453-5000), C406-2HM (453-5001)
Table 3 Electrical Specifications
406.025 MHz
406.028 MHz, or higher ± 1 KHz
121.5 and 243.0 MHz ± 0.005%
406 MHz Bi-Phase L (G1D)
121.5 and 243.0 MHz Amplitude Modulation (A3X)
± 5 KHz (5 years)
2 parts/10E9 in 100 ms
± 2 KHz (Initial)
Transmitter Duty Cycle
Peak Effective Radiated
Power (PERP)
Occupied Bandwidth
Spurious Emissions
Battery
440 ms (± 1%) or
406 MHz
121.5 and 243.0 MHz Continuous
406 MHz
Min. 50 mW (17 dBm) PERP for 50 hrs
121.5 and 243.0 MHz
(20 dBm) for 48 hrs @ -20° to +55° C
406 MHz 20 KHz max.
121.5 and 243.0 MHz 25 KHz max.
406 MHz Per RTCA/DO-204
121.5 and 243.0 MHz Per CFR Title 47 (FCC), Part 87
Type of Cell Lithium Manganese Dioxide
Voltage 12.0
Amp-Hour Rating 10.0
520 ms (± 1%), every
50 seconds (± 5%)
5 W (37 ±2 dB) PERP or
EIRP for 24 hrs @ -20° to +55° C
@ -20° to +55° C or 100 mW EIRP
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-870-003
C. Antennas
(1) Table 4 lists the specifications of the antennas approved for use with the C406-2 Series ELT.
Table 4 Antenna Specifications
CHARACTERISTIC
PARAMETERS
110-320 110-328-01 110-333 110-337 110-337-11
Style Rod Blade Blade Blade Blade
Frequencies 121.5, 243.0, 406 MHz
121.5 and 243.0 MHz
VSWR
Polarization Vertical Monopole
Radiation
Pattern
Impedance
(ohms)
Weight
Coax Cable RG-142
Connectors BNC Female (121.5/243.0 MHz) and TNC Female (406 MHz)
Dimensions
(Base-to-Tip)
- 2.0:1 Max.
406 MHz - 1.5:1 Max.
0.45 lbs
(0.20 kg)
15.50 in.
(39.4 cm)
121.5/243.0 MHz - 2.0:1 or
better
406 MHz - 1.5:1 or better
121.5/243 MHz - Omnidirectional
406 MHz - Hemispherical
50 Nominal
1.20 lbs
(0.54 kg)
9.00 in.
(22.9 cm)
0.76 lbs
(0.34 kg)
10.10 in.
(25.7 cm)
121.5/243.0 MHz - 2.0:1 Max.
406 MHz - 1.5:1 Max.
1.30 lbs
(0.59 kg)
7.75 in.
(19.7 cm)
1.60 lbs
(0.73 kg)
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TEST AND FAULT ISOLATION
TASK 25-62-11-750-801
1. Inspection and Test Regulatory Requirements
SUBTASK 25-62-11-990-001
A. United States
(1) In accordance with FAR Part 91, Subpart C, § 91.207 (d), the ELT must be inspected within 12
calendar months after the last inspection for:
(a) Proper installation;
(b) Battery corrosion;
(c) Operation of controls and crash sensor; and
(d) The presence of a sufficient signal radiated from its antenna.
(2) All maintenance shall be performed in accordance with FAR Part 43, Appendix D, which
requires the following inspections at each annual or 100-hour inspection:
(a) ELT and mount for improper installation;
(b) Wiring and conduits for improper routing, insecure mounting, and obvious defects;
(c) Bonding and shielding for improper installation and poor condition; and
(d) Antenna, including trailing antenna, for poor condition, insecure mounting, and improper
operation.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-002
B. Canada
(1) CAR Part VI, Standard 625, Appendix C, requires the ELT to be inspected at intervals not
exceeding 12 months.
(2) All maintenance and testing shall be performed in accordance with the requirements of CAR
Part V, Standard 571, Appendix G, which requires:
(a) Corrosion inspection;
(b) Operational testing;
(c) Performance testing, including:
1
Measured peak power after 3 minutes of operation,
2
Measured frequency after 3 minutes of operation,
3
Audio modulation, which shall be recognizable as a typical ELT signal,
Measured current draw in the “OFF” (ARM) and in the “ON” position, as specified
4
by the manufacturer, and
C406-2 (453-5000), C406-2HM (453-5001)
5
The automatic activation system.
SUBTASK 25-62-11-990-003
C. Other Countries
(1) For all other countries, maintenance and testing shall be conducted in accordance with the
requirements of applicable national regulatory authorities and the requirements herein, as
applicable. Local regulations and requirements shall take precedence.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TASK 25-62-11-750-802
2. Inspection and Test Procedures
SUBTASK 25-62-11-990-001
A. Checklist
(1) Table 5 provides a list of the ELT inspection and testing requirements, a copy of which may be
used as a checklist to verify inspection and test completion. The item numbers in the table
correspond to the item identifiers for each task.
NOTE
: Items 5a through 5h are mandatory requirements only in Canada, in addition to
meeting the other inspection and test requirements listed in Table 5.
Table 5 ELT Inspection and Test Checklist
ITEM NO. DESCRIPTION BY
1 Coax Cable and Wiring Connections Inspection
2 ELT Mounting Tray and Hardware Inspection
3 ELT Battery Pack Inspection
4 G-Switch Functional Check
5a 121.5 MHz Frequency Measurement
5b Audio Modulation Check
5c 121.5/243.0 MHz Power Output Measurement
5d 406 MHz Frequency Measurement
5e 406 MHz Power Output Measurement
5f Current Draw Test
5g Digital Message Verification
5h ELT Reset Check
6 Installed Transmitter Test
7 Antenna Test
8 Inspection and Test Documentation
SUBTASK 25-62-11-000-001
B. Preparation
(1) Remove the ELT in accordance with SUBTASK 25-62-11-010-001 on page 51.
(2) Remove the battery pack in accordance with SUBTASK 25-62-11-050-001 on page 52.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-220-001
C. Coax Cables and Wiring Connections Inspection – Item 1
(1) Check remote switch harness connector for corrosion bent or broken pins and other damage.
(2) Check antenna coax cable connectors for corrosion, bent or broken center conductor, and
other damage.
NOTE
: Pay special attention to the center conductor, which is prone to retracting into the
connector housing.
SUBTASK 25-62-11-220-002
D. Mounting Tray and Hardware Inspection – Item 2
(1) Inspect mounting tray for cleanliness, cracks, and other damage.
(2) Check mounting tray hardware for corrosion and security.
SUBTASK 25-62-11-220-003
E. Battery Pack Inspection – Item 3
CAUTION
CAUTION
(1) Check battery cells, components, and connectors for corrosion and other damage.
(2) Check wiring for breaks, damaged insulation, and improper or damaged connections.
(3) Check housing for cracks and other visual damage.
(4) Remove any corrosion residue from the underside of the ELT.
(5) Check the battery pack expiration date.
(6) Replace the battery pack if any of the following conditions are true:
: THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD)
COMPONENTS AND, AS SUCH, IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR
A GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING
INSPECTION AND MAINTENANCE ACTIVITIES. TAKE PARTICULAR CARE TO AVOID
TOUCHING THE EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD.
: DO NOT USE CONTACT CLEANER ON ELT COMPONENTS. SUCH CHEMICAL AGENTS
CAN BE HIGHLY DESTRUCTIVE TO THE MOUNTING HARDWARE AND ELT HOUSING,
CAUSING CRACKING, FRACTURING AND OTHER DAMAGE.
(a) After use in an emergency;
(b) After an inadvertent activation of unknown duration;
(c) When the total of all known transmissions exceeds one hour; or
(d) On or before battery replacement (expiration) date.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-750-001
F. G-Switch Functional Check – Item 4
CAUTION
(1) Reinstall the battery in accordance with SUBTASK 25-62-11-450-001 on page 74.
(2) Perform this functional check within the first 5 minutes after the hour (UTC), as required by
(3) Notify any nearby control tower of your intentions.
(4) Install the 151-2012 test plug (receptacle) on the ELT plug or jumper ELT plug Pins 5 and 8.
(5) Verify the ELT switch is in the “OFF” position.
(6) Monitor 121.5 MHz on an AM receiver.
(7) Activate the ELT by using a rapid forward (i.e., throwing) motion in the direction of the arrow
: A JUMPER IS REQUIRED TO PERFORM THIS CHECK. DUE TO THE POTENTIAL OF
PHYSICAL DAMAGE IF THE JUMPER IS IMPROPERLY INSTALLED, THIS STEP SHOULD
ONLY BE PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.
NOTE
: If tests 5a through 5h are going to be performed, the battery may be temporarily
installed with only two screws, located on a diagonal from each other.
AC 43.13-1, Chapter 12, § 12-22, Note 3.
NOTE
: The ELT cannot be activated using this procedure unless Pins 5 and 8 on the ELT
plug are jumpered. See "Figure 21 Remote Switch Harness Wiring Diagram” on
page 66.
on the ELT label, followed by a rapid reversing action.
(8) Verify activation by listening for the aural sweep tone on the receiver.
(9) Reset the ELT by toggling the control switch to the “ON” position and then back to the “OFF”
position.
SUBTASK 25-62-11-750-002
G. Performance Testing Setup
NOTE
: The ELT software routine logs battery life in 30-second increments. A minimum of 30
seconds is added to the battery usage total each time the ELT is activated and de-activated.
If the ELT is left activated beyond the first 30 seconds, additional time is added in 30second increments.
NOTE
: Careful planning of the performance tests is necessary to avoid activating the ELT more
than necessary. Plan the performance testing in a manner that allows tests to be run
concurrently and test equipment settings to be quickly switched from one test to another.
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ELT ANTENNA
BNC CONNECTOR
(121.5/243.0 MHz)
TPS CONNECTOR
(406 MHz)
30 dB
ATTENUATOR
(if required)
MEASURING
DEVICE
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
By doing so, the three-minute warm-up requirement can be eliminated from a number of
tests and battery run time minimized to a large extent.
(1) Place the ELT in a container or screen room capable of substantially attenuating RF signals, or
the transmitter power output shall be connected to a suitable dummy load to minimize
radiation.
(2) Use the ELT’s own battery pack as the power source for these measurements. An alternate
power source can be used where lengthy servicing, other than the performance tests, is
anticipated.
(3) Ensure that adequate attenuation rated for 406 MHz is installed between the ELT antenna
output and the measurement equipment to prevent damaging input circuitry, if required. At a
minimum, the attenuator should be rated at 30 dB, and 5 watts for a ½-second duration. As
shown in Figure 8.
Figure 8 Performance Testing Equipment Setup
SUBTASK 25-62-11-750-003
H. 121.5 MHz Frequency Measurement – Item 5a
(1) Connect the measuring device, referring to SUBTASK 25-62-11-750-002 on page 40.
(2) Activate the ELT by placing the control switch in the “ON” position.
(3) Wait three minutes.
(4) Perform SUBTASK 25-62-11-750-004 during the three-minute waiting period.
(5) Measure the frequency after the three-minute waiting period. The frequency must be within
the tolerance specified in Table 3 on page 34.
NOTE
: If the 121.5 MHz carrier frequency is within specified tolerance, the 243.0 MHz
frequency will also be within tolerance.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-750-004
I. Audio Modulation Check – Item 5b
(1) Perform this check in conjunction with SUBTASK 25-62-11-750-003.
(2) Monitor 121.5 MHz on an AM receiver.
(3) Listen for the aural sweep tone on the receiver. The audio should “sound” like an ELT.
SUBTASK 25-62-11-750-005
J. 121.5/243.0 MHz Power Output Measurement – Item 5c
(1) Connect the measuring device, referring to SUBTASK 25-62-11-750-002 on page 40.
(2) Activate the ELT, if necessary, by placing the control switch in the “ON” position.
(3) Wait three minutes.
(4) Read the displayed amplitude for 121.5 MHz. The amplitude must be within the minimum
specified for 121.5 MHz in Table 3 on page 34 at the terminal output.
(5) Change to 243.0 MHz and repeat the procedure for 243.0 MHz.
SUBTASK 25-62-11-750-006
K. 406 MHz Frequency Measurement – Item 5d
CAUTION
(1) Connect the measuring device, referring to SUBTASK 25-62-11-750-002 on page 40.
(2) Activate the ELT, if necessary, by placing the control switch in the “ON” position.
(3) Wait three minutes.
(4) Measure the frequency. Measure the frequency after the three-minute waiting period. The
SUBTASK 25-62-11-750-007
L. 406 MHz Power Output Measurement – Item 5e
CAUTION
: POWER OUTPUT IS APPROXIMATELY 37 DB (5 WATTS). BE SURE ADEQUATE
ATTENUATION IS INSERTED IN-LINE BETWEEN THE ELT ANTENNA OUTPUT AND THE
MEASURING DEVICE TO PROTECT THE INPUT CIRCUITS OF THE MEASURING DEVICE.
frequency must be within the tolerance specified in Table 3 on page 34.
NOTE
: The exact 406 MHz frequency used is printed on the ELT product label.
: POWER OUTPUT IS APPROXIMATELY 37 DB (5 WATTS). BE SURE ADEQUATE
ATTENUATION IS INSERTED IN-LINE BETWEEN THE ELT ANTENNA OUTPUT AND THE
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
MEASURING DEVICE TO PROTECT THE INPUT CIRCUITS OF THE MEASURING DEVICE.
(1) Connect the measuring device, referring to SUBTASK 25-62-11-750-002 on page 40.
(2) Activate the ELT, if necessary, by placing the control switch in the “ON” position.
(3) Wait three minutes.
(4) Read the displayed amplitude of the 406 MHz burst that follows the three-minute wait period.
The amplitude must be within the minium specified for 406 MHz in Table 3 on page 34, at the
output terminal.
(5) Deactivate the ELT by placing the control switch in the “OFF” position.
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+
A
—
CIRCUIT BOARD IN
BATTERY PACK
TO ELT
611-0024
TEST HARNESS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-750-008
M. Current Draw Test – Item 5f
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
CAUTION
(1) Verify the ELT control switch is in the “OFF” position.
(2) Separate the battery pack from the ELT.
(3) Disconnect the 2-wire ELT power connector.
(4) Install test harness 611-0024, or equivalent, in the power circuit. See Figure 9.
: EXERCISE EXTREME CAUTION TO AVOID CAUSING A SHORT CIRCUIT CONDITION,
WHICH WILL BLOW THE FUSES IN THE BATTERY PACK. THIS TEST SHOULD ONLY BE
PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.
: ALL “ON” STATE CURRENT MEASUREMENTS MUST BE MADE WITH THE RF OUTPUT
(I.E., ELT ANTENNA CONNECTOR) LOADED WITH 50 OHMS RATED FOR 5 WATTS.
EITHER A RESISTIVE LOAD OR EQUIPMENT WITH 50 OHM IMPEDANCE PADDED WITH
10 DB/5 WATT ATTENUATOR. REFER TO SUBTASK 25-62-11-750-002 ON PAGE 40.
(5) Read the current draw on the ammeter. Measured current should be 0 µA (micro-amps), and
must not be more than 6 µA.
(6) Verify the ammeter is set to accommodate a range of at least 3.5 amps.
(7) Activate the ELT by placing the control switch in the “ON” position.
(8) Allow the ELT to stabilize for at least 30 seconds to avoid false readings.
Figure 9 Current Draw Test Setup
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(9) Read the current draw on the ammeter. Steady state current draw must not exceed 200 mA.
(10) Deactivate the ELT by placing the control switch in the “OFF” position.
(11) Remove the test harness.
(12) Reinstall the battery pack in accordance with SUBTASK 25-62-11-450-001 on page 74.
SUBTASK 25-62-11-750-009
N. Digital Message Verification – Item 5g
(1) Set the 453-1000 ELT Test Set (ETS) beacon reader to receive and decode the ELT digital
message. Refer to the ETS operating manual (570-1000) for ETS operating instructions and
additional details.
NOTE
: A beacon reader equivalent to the ETS may be used, provided it is capable of
receiving and decoding the 406 MHz digital message.
(2) Activate the ELT by placing the control switch in the “ON” position.
(3) Allow the ELT to transmit for appro xi a mt ely 5 seconds.
(4) Deactivate the ELT and read the test message broadcast at “turn-off”. Message examples are
shown in Figure 10.
(a) The test message broadcast by the ELT at “turn-off” contains all the information in an
actual distress message, except there is a special digital prefix that informs COSPASSARSAT satellites to ignore the message.
(b) The left hand example in Figure 10, is an ELT programmed for “User Protocol ELT with
Serial Number”, with a test Hex ID. The right hand example is an ELT programmed for
“Standard Location Protocol ELT with Serial Number”.
(c) Actual messages will vary depending on the protocol and information programmed into
the ELT.
(d) If the ELT is programmed with a location (long message) protocol and disconnected
from the ELT/NAV Interface, the message will indicate “Position Invalid” in lieu of
position data, as shown in the right hand example in Figure 10.
Sarsat Beacon Reader
Beacon ID = ADDF8E345CD35D0
Message Type = Test, Short
Country = 366 USA
Aviation ELT S/N = 6521
Type Approval # = 112
Aux Locating Devices = No
121.5 MHz Beacon = Yes
Nov 13, 2009 11:39 am 55 sec
ClearDonePrint
Figure 10 Short and Long 406 MHz Message Examples
(5) Repeat the activation and deactivation cycle if the ETS fails to read the message on the initial
try. The 406 MHz oscillator may not be warmed up. If continued attempts to read the
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
message fail, check for self-test error codes and refer to Table 6 on page 49.
SUBTASK 25-62-11-750-010
O. ELT Reset Check – Item 5h
(1) Place the ELT control switch in the “ON” position.
(2) Return the switch to the “OFF” position.
(3) If the ELT is working properly, the LED will stay on for approximately 1 second and then turn
off. If a series of flashes are displayed, refer to Table 6 on page 49.
NOTE
: A 5-flash error indication will occur if the ELT is programmed with a location protocol,
since no navigation input data is present.
SUBTASK 25-62-11-750-011
P. Installed Transmitter Test – Item 6
CAUTION
(1) Reinstall the ELT in accordance with SUBTASK 25-62-11-410-001 on page 71.
(2) Perform the following functional check within the first 5 minutes after the hour (UTC), as
(3) Notify any nearby control tower of your intentions.
(4) Tune a receiver, usually the aircraft transceiver, to 121.5 MHz.
(5) Activate the ELT by placing the cockpit remote switch in the “ON” position. The LED will begin
(6) Listen for 3 audible sweeps on the receiver, which takes about 1 second.
(7) Verify the buzzer sounds immediately upon activation.
(8) Return the cockpit remote switch to the “ARM” (OFF) position while paying close attention to
: DO NOT ALLOW THE DURATION OF THIS TEST TO EXCEED 5 SECONDS. THE ELT
WILL TRANSMIT A 406 MHZ SIGNAL AFTER THE ELT IS ACTIVATED FOR
APPROXIMATELY 47 SECONDS. THE COSPAS-SARSAT SATELLITE SYSTEM WILL
CONSIDER THE 406 MHZ TRANSMISSION TO BE A VALID DISTRESS SIGNAL.
required by AC 43.13-1, Chapter 12, § 12-22, Note 3.
NOTE
: An AM radio may be used to receive the signal.
flashing continuously.
LED activity when the ELT enters the “ARM” condition. If the ELT is working properly, the LED
will stay on for approximately 1 second and then turn off.
NOTE
: This test also completes the requirement to check ELT controls by verifying operation
of the remote switch.
(9) Refer to Table 6 on page 49 if the LED displays a series of error code flashes.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-750-012
Q. Antenna Test – Item 7
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
(1) Tune a low quality AM receiver (i.e., radio) to 121.5 MHz.
(2) Place the radio approximately six inches from the antenna.
(3) Activate the ELT by placing the cockpit remote switch in the “ON” position.
(4) Listen for 3 audible sweeps on the radio, which takes about 1 second. An audible signal
(5) Reset the ELT by placing the cockpit remote switch in the “ARM” position.
SUBTASK 25-62-11-750-013
R. Inspection and Test Documentation – Item 8
(1) Make an appropriate entry in the aircraft maintenance records (i.e., logbook), including the
: DO NOT ALLOW THE DURATION OF THIS TEST TO EXCEED 5 SECONDS.
NOTE
: The aircraft transceiver is not recommended for this test, because it is too sensitive
to verify the integrity of the antenna system and it may pick up a weak signal even if
the antenna is disconnected from the ELT. An AM radio provides a better level of
confidence for this test.
NOTE
: Perform this test within the first five minutes after the hour UTC.
verifies energy is being transmitted by the antenna.
date the ELT inspection and testing was satisfactorily completed.
(2) In addition to the requirements of Step 1, for aircraft operating under Canadian authority and
following satisfactory completion of performance testing, the date on which the test was
performed shall be marked on the ELT external casing in a legible and permanent manner.
TASK 25-62-11-810-801
3. Fault Isolation
SUBTASK 25-62-11-810-001
A. Self-Test Error Troubleshooting Guidelines
(1) Table 6 describes the ELT self-test LED error codes (i.e., flash codes), their probable causes,
and possible solutions. The 5-flash error is not present when the ELT is programmed with a
serial user protocol (short message).
NOTE
: Upon activation, the LED will display a long single flash, which is normal. Any self-
test error codes will display following this initial flash. Do not confuse the initial flash
with a 1-flash error code. If there are multiple errors, there is a 0.5 to 1.0 second
pause between each error code.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
Table 6 ELT Self-Test Error Codes Troubleshooting Guide
CODE PROBABLE CAUSE POSSIBLE SOLUTION
Indicates a G-switch loop open (Pins 5 and 8)
1-Flash
3-Flash
Remote switch harness connector loose or
disconnected at ELT
ELT connector pins bent or broken
Connector pins 5 and 8 jumper open
(internal to remote switch harness
connector at ELT end)
Indicates a 406 MHz transmission problem
Open or short condition on antenna
output or coax cable
Antenna or installation faulty
Impedance presented by antenna
Check connector and tighten as necessary
Check condition of connector pins and
repair or replace as necessary
Repair open jumper
Verify the coax cable/antenna is
connected and in good condition
Perform continuity check of center
conductor and shield
Check for a shorted cable
Check for intermittent connection in the
coax cable
Check with a VSWR meter. Check antenna
for opens, shorts, or a resistive ground
plane connection
Lengthen or shorten antenna coax cable
length by 4 to 6 inches
Insufficient ground plane
Upright metal structure obstructing
antenna causing re-radiation
Low power output
Improper programming Verify 406 MHz programming
Transmitter module faulty
Provide ground plane at least 12 inches in
diameter
Stay at least 10-12 inches away from
upright metal structures
Battery low
3A fuse on battery pack circuit board
faulty
Cannot be repaired in field - Return to
factory for servicing
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
CODE PROBABLE CAUSE POSSIBLE SOLUTION
Indicates there is no navigation position data present
Aircraft navigation system off Turn on navigation system
5-Flash
7-Flash
SUBTASK 25-62-11-810-002
B. ELT Troubleshooting Guidelines
(1) Table 7 provides ELT troubleshooting guidelines for installation and operational issues.
SYMPTOM PROBABLE CAUSE POSSIBLE SOLUTION
Faulty system interface wiring or
No 453-6500 ELT/NAV Interface installed
Operating time is >1 hour
Electrical circuits faulty
Check wiring and connections for
connections
Install 453-6500 ELT/NAV Interface
Reprogram to short message
Indicates a battery problem
Table 7 ELT Troubleshooting Guide
Improper wiring Verify wiring
continuity and security
Replace battery pack
Remote switch LED always on
(steady)
ELT will not turn off
Check for frayed insulation
Short circuit
Battery too low to support 406
burst and causes circuit to reset
Turn off ELT using local switch - If ELT turns off:
Defective remote switch harness
reset circuit wiring
Defective remote switch Replace remote switch
If ELT does not turn off using local switch:
ELT defective
Verify integrity of all crimp and
solder connections
Remove battery pack to disable
ELT and replace battery pack
Check wiring continuity and
repair as necessary
Remove battery pack to disable
ELT and return ELT to factory for
servicing
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PROTECTIVE TOP
COVER ASSY
MOUNTING FRAME
CAP ASSY
ELT MAIN
ASSY
MOUNTING
TRAY ASSY
2
3
7
4
5
DISCONNECT COAX
CABLE
DISCONNECT HARNESS
1
LOOSEN THUMBSCREW
(2 PLCS)
6
DISCONNECT COAX
CABLE
NOTE: Coax cables and
wiring harness not
shown for clarity.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-010-801
1. ELT
SUBTASK 25-62-11-010-001
A. ELT Removal
(1) See Figure 11.
C406-2 (453-5000), C406-2HM (453-5001)
REMOVAL
Figure 11 ELT Removal Sequence
(2) Loosen the mounting frame cap thumbscrews.
(3) Slide the mounting frame cap back away from the ELT.
(4) Lift the protective top cover up, away from the ELT and set it aside.
(5) Disconnect the two antenna coax cables from the ELT.
(6) Disconnect the harness receptacle from the ELT, if necessary.
NOTE
(7) Lift the ELT up from the connector end.
NOTE
(8) Slide the ELT up and out, away from the mounting tray.
: The receptacle may disconnect when the mounting frame cap is pulled back.
: Careful use of a flat blade screwdriver as a lever will make this step easier.
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NOTE: Plug is
recessed in
ELT Assembly
RTV puddle
ELT ASSEMBLY
BATTERY PACK
SCREW (4 PLCS)
DISCONNECT
DISCONNECT
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-050-801
2. Battery
SUBTASK 25-62-11-050-001
A. Battery Pack Removal
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
: THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD)
COMPONENTS AND IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A
GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING
INSTALLATION ACTIVITIES. TAKE PARTICULAR CARE TO AVOID TOUCHING THE
EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD
CAUTION
: THE BATTERY PACK IS CONNECTED TO THE ELT VIA SHORT INTERCONNECT
HARNESSES, WHICH LIMIT THE DISTANCE THE TWO COMPONENTS CAN BE
SEPARATED UNTIL THE HARNESSES ARE DISCONNECTED.
(1) See Figure 12.
Figure 12 Battery Pack Removal
(2) Turn the ELT upside down, such that the battery pack is bottom side up.
(3) Remove the four retaining screws.
(4) Lay the ELT on its side, while keeping the ELT and battery pack securely held together.
(5) Separate the battery pack from the ELT, taking care not to put strain on the short interconnect
harnesses.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(6) Disconnect the large harness from the 8-pin header on the small circuit board mounted in the
battery pack.
(7) Disconnect the battery pack 2-wire harness from the connector recessed in the ELT body.
TASK 25-62-11-500-801
3. Material or Equipment Return
SUBTASK 25-62-11-510-001
A. Shipment Information
(1) If any material or equipment is to be returned to the factory, under warranty or otherwise,
ACR Electronics must be notified prior to shipment with the following information:
(a) Model and serial number of equipment being returned,
(b) Date purchased,
(c) Date placed in service,
(d) Number of hours in service,
(e) Nature and cause of failure, and
(f) Remarks, if any.
SUBTASK 25-62-11-580-001
B. Return Material Authorization
(1) Upon receipt of such notice, ACR Electronics will issue a Return Material Authorization (RMA)
number which then authorizes return of the material or equipment to the following address:
(a) Failure to obtain a RMA number and provide the details listed in SUBTASK 25-62-11-510-
001 may cause unnecessary delay and/or rejection of the returned material or
equipment.
Repair and Overhaul
ACR Electronics, Inc.
5757 Ravenswood Road
Fort Lauderdale, FL 33312 USA
Phone: (954) 981-3333
Fax: (954) 983-5087
(b) All material or equipment returned to the factory must be freight prepaid.
(c) Acceptable methods of shipment for international return are Airborne, Burlington Air,
DHL, Emery, Federal Express, UPS International, and World Wide only.
NOTE
: Do not use “International Commercial Airlines”, such carriers may cause a loss
of returned material or equipment.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
INSTALLATION
TASK 25-62-11-410-801
1. Regulatory Requirements and Guidelines
SUBTASK 25-62-11-990-001
A. TSO C126, Paragraph D
(1) TSO approval of the ELT does not constitute installation approval. All ELT installations are
subject to field approval for a given airframe by either an approved FAA DER or FAA FSDO.
For installations outside the US, contact your local civil aviation regulatory agency for details.
(a) The remote switch is a requirement of TSO C126 and installation is not optional.
(b) The buzzer is a requirement of TSO C126 and installation is not optional.
SUBTASK 25-62-11-990-002
B. FAA
(1) This manual constitutes supporting data, as described in AC43.9-1, Paragraph 6.h.(2) and AC
43-210, Chapter 2, Paragraph 201(a)(6), and as such may be used as support for FAA field
approval of the ELT installation.
(2) In addition to the procedures outlined herein and in accordance with FAR Part 43, the installer
must adhere to the aircraft manufacturer’s instructions and recommendations and the
guidelines provided by FAA Advisory Circular AC 43.13-2 “Acceptable Methods, Techniques,
and Practices - Aircraft Alterations”, specifically Chapters 1 through 3, 11, and 13.
(3) By signing the aircraft logbook, and FAA Form 337, the installer is stating the installation has
been performed in accordance with current FAR requirements and the procedures outlined
herein. The completed Form 337 is provided to the FAA and also becomes a permanent part of
the aircraft maintenance records in accordance with AC43-9, Paragraph 17.
SUBTASK 25-62-11-990-003
C. Canada
(1) All installations must be performed in accordance with Canadian Aviation Regulations (CAR)
Part V, Chapter 551, Paragraph 551.104.
SUBTASK 25-62-11-990-004
D. Other Countries
(1) Installations in aircraft outside of the United States and Canada, must be performed in
accordance with applicable regulatory authority rules and regulations.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-005
E. RTCA
(1) DO-204, § 3.1.8 guidelines for mounting a ELT:
(a) The ELT shall be mounted to primary aircraft load carrying structures, such as trusses,
bulkheads, longerons, spars, or floor beams.
(b) The mounts shall have a maximum static local deflection no greater than 0.1 inches (2.5
mm) when a force of 100 lbs (450 newtons) is applied to the mount in the most flexible
direction. Deflection measurements shall be made with reference to another part of the
aircraft not less than 1 foot (0.3 meters) nor more than 3 feet (1.0 meters) from the
mounting location.
(2) DO-182, § 6.2.2.b recommends that:
(a) To maximize the probability of the ELT transmitting a detectable signal after a crash, all
ELT system components, which must survive a crash intact, e.g. transmitter and
external antenna, should be attached to the airframe in such a manner that the
attachment system can support a 100
100, etc.) applied through the center of gravity of the component (ELT, antenna, etc.) in
the plus and minus directions of the three principal axes of the aircraft.
C406-2 (453-5000), C406-2HM (453-5001)
g
load, (ELT weight x 100, ELT antenna weight x
(b) Post-crash critical components of the ELT system, e.g., transmitter and external
antenna, should be mounted as close to each other as possible.
(c) The antenna coax cable should not cross any production breaks, e.g., major structure
sections, such that the ELT and antenna are in the same section of the aircraft and as
close together as possible.
(d) If the ELT and external antenna are on opposite sides of an airframe production break,
the components should be secured to each other by a tether that can support a 100
load (ELT weight x 100). The interconnecting antenna-to-ELT coax cable should have
sufficient slack on both ends that it will not be subjected to any tensile load and should
be tied loosely to the tether.
TASK 25-62-11-450-801
2. Mounting Tray
SUBTASK 25-62-11-450-001
A. Location
CAUTION
: MANY ORIGINAL ELT INSTALLATIONS ARE INADEQUATE AS FAR AS UNIT LOCATION
AND SURFACE RIGIDITY ARE CONCERNED. BECAUSE OF THE CRITICAL FUNCTION AN
ELT PERFORMS, IT IS IMPORTANT THE INSTALLATION FOLLOWS THE INSTRUCTIONS
AND RECOMMENDATIONS HEREIN.
g
CAUTION
CAUTION
: THE MOUNTING SURFACE MUST BE EXTREMELY RIGID; THEREFORE, MOUNTING AN
ELT DIRECTLY TO THE AIRCRAFT SKIN IS UNACCEPTABLE. MOUNTING THE ELT
DIRECTLY TO THE AIRCRAFT SKIN INDUCES “CRASH HIDING” VIBRATIONS AND
PROVIDES A VERY POOR MOUNTING SURFACE.
: AVOID LOCATING THE ELT WHERE IT WILL BE SUBJECTED TO UNPROTECTED
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FLIGHT
5.21
(132)
1.71
(43)
11.63
(295)
5.50
(140)
3.42
(87)
2.00
(51)
3.76
(96)
3.90
(99)
0.17 (4) Ø MOUNTING
HOLES (4 PLCS)
Dimensions in inches (mm)
NOTE: Allow a minimum of
5 inches (127 mm) of clearance
in front of the mounting frame cap
to facilitate cap removal.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
EXPOSURE TO HARSH CHEMICAL FLUIDS SUCH AS DEICING COMPOUNDS. THESE
TYPES OF CHEMICAL FLUIDS CAN PROMOTE CRACKING AND FRACTURING OF THE
ELT MOUNTING FRAME AND HOUSING COMPONENTS BY DEGRADING THE
STRUCTURAL INTEGRITY OF THESE COMPONENTS. THESE SAME CHEMICAL AGENTS
MAY ALSO CAUSE CORROSION OF ELECTRICAL CONNECTIONS.
(1) Select a suitable location for the ELT mounting tray. See Figure 13. Refer to these dimensions
when determining mounting location.
Figure 13 C406-2 Series ELT Outline and Dimensions
(2) Locate the mounting tray such that the ELT mounting frame cap has at least 5 inches (127
mm) of clearance for installation and removal.
(3) Mount the ELT as far aft as practical, but where it can be easily retrieved for maintenance.
NOTE
: Statistics show that the tail section of an airplane is likely to be less damaged during
a crash; therefore, providing a good mounting environment for the ELT.
(4) Additional installation guidance may be found in AC 43.13-2, Chapter 2, Paragraph 28, which
specifically addresses ELT installations.
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
8-32 x 5/8 SCREW
(4 PLCS)
#8 FLAT WASHER
(4 PLCS)
#8 LOCK WASHER
(4 PLCS)
8-32 X 1/4 HEX NUT
(4 PLCS)
AIRFRAME
STRUCTURE (REF.)
EQUIPMENT MOUNTING
PLATE (REF.)
MOUNTING
TRAY
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-450-002
B. Installation
(1) See Figure 14.
C406-2 (453-5000), C406-2HM (453-5001)
Figure 14 Typical Mounting Tray Installation
(2) Install the necessary mounting structure as appropriate for the specific installation.
(3) Align the mounting tray (452-5050) on the mounting structure, such that the arrow on the
tray is within 10° of the longitudinal axis of the aircraft and pointing in the direction of flight.
NOTE
: Refer to TASK 25-62-11-410-803 on page 76 for guidelines on ELT orientation in a
helicopter.
(4) Mark the four holes needed for mounting the tray, using the tray as a pattern. The hole
pattern is also illustrated in "Figure 13 C406-2 Series ELT Outline and Dimensions” on
page 56.
(5) Drill the four mounting holes with a #19 or 4.25 mm drill.
(6) Install the mounting tray with the 8-32 x 5/8” SS pan head phillips screws, flat washers, lock
washers, and nuts provided in the installation kit (455-7421), as shown in "Figure 14 Typical
Mounting Tray Installation” on page 57.
NOTE
: The use of substitute mounting hardware is acceptable provided the hardware used
meets or exceeds the strength and corrosion resistance of the original hardware.
(a) Torque to 12 ±1 lb-in (136 ± 11 N•cm).
25-62-11
Page 56 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-450-802
3. Antenna
SUBTASK 25-62-11-990-001
A. Selection
(1) Use only antennas approved for use with the C406-2 Series ELT. The ELT will not work
properly without being connected to an antenna for which it was designed.
(2) Verify the antenna selected matches the requirements of the specific installation.
Considerations include aircraft maximum rated speed, location restrictions, and any other
considerations specific to the installation.
SUBTASK 25-62-11-450-001
B. Location
(1) Select a suitable location for the antenna.
C406-2 (453-5000), C406-2HM (453-5001)
(a) Place the antenna in a location where the antenna can be installed within 15° of vertical
and with at least 30 inches (762 mm) of clearance from other antennas, particularly
VHF, in accordance with RTCA/DO-204, § 3.1.10.2.
NOTE
: AC 43.13-2, Chapter 3 recommends a minimum distance of 36 inches (914
mm) clearance between antennas.
(b) Additional location guidance may be found in AC 43.13-2, Chapter 3, which deals
specifically with antenna installations.
SUBTASK 25-62-11-450-002
C. Installation
NOTE
: Refer to the airframe manufacturer’s written instructions and AC 43.13-2, Chapter 3 for antenna
installation practices and requirements.
(1) Install a doubler plate if necessary to meet rigidity requirements. A 20 lb (9.1 kg) force applied
to the antenna in all directions should not cause an appreciable distortion in the aircraft skin.
(2) Install a ground plane if necessary. In certain applications, particularly those where antennas
are installed on composite, fabric, or wood airframes, a ground plane is required.
(3) Drill the antenna mounting holes and coax connector holes referring to the appropriate
antenna illustration for hole patterns and hole sizes.
THIS IS A BLANK PAGE
(a) See "Figure 15 Rod Antenna 110-320 and Blade Antenna 110-328-01 Outlines and
Dimensions” on page 59, "Figure 16 Blade Antennas 110-333 and 110-337 Outlines and
Dimensions” on page 60, and "Figure 17 Blade Antenna 110-337-11 Outline and
Dimensions” on page 61.
(4) Mount the antenna referring to the appropriate antenna illustration for hardware
requirements, torque, and other applicable installation requirements.
(5) Two coax cables, 6 feet (1.8 m) long, are provided as part of the ELT kit. The 121.5/243.0
25-62-11
Page 57 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
13.00
(330)
3.5
(89)
3.3
(84)
RF CONNECTOR
TNC FEMALE
15.50 MAX
(394)
2.70 MAX
(69)
1.625 (41.3)
0.812 (20.6)
0.750 (19.1)
0.90 (23)
1.750 (44.5)
4.40 MAX
(112)
RF CONNECTOR
BNC FEMALE
4 - 100° CSK HOLES
Ø 0.170 (4.3)
110-320
Dimensions in inches (mm)
C.G.
INSTALLATION NOTES:
1. MOUNT ANTENNA USING #8-32 SS 100° C’SK
MACHINE SCREWS AND ASSOCIATED
HARDWARE.
TORQUE TO 20 ±1 LB-IN (226 ±11 N•cm)
2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE
BNC CONNECTOR AND 0.703 (45/64”)
(17.9 MM) Ø HOLE FOR TNC CONNECTOR.
3. PROVIDE 0.182 (4.6 MM) Ø HOLES (4 PLCS)
FOR ATTACHING SCREWS.
4. APPLY A LAYER OF ANTI-CORROSION BONDING
GREASE BETWEEN AICRAFT AND ANTENNA BASE.
5. GASKET NOT SUPPLIED AND USE OPTIONAL.
REQUEST P/N 280-0320 IF ONE IS DESIRED.
GASKET (OPTIONAL)
1.300 (33.0)
9.00 MAX
(229)
6.50
(165)
5.10
(130)
2.70
(69)
5.47
(139)
RF CONNECTOR
BNC FEMALE
RF CONNECTOR
TNC FEMALE
RUBBER AND CORK GASKET
0.062 (2) THICK
8.40 (213)
6.000 (152.4)
5.58 (142)
1.620 (41.1)
3.000 (76.2)
1.10 (28)
1.500 (38.1)
1.250 (31.8)
0.625 (15.9)
110-328-01
Dimensions in inches (mm)
1.125 (28.6)
0.5625 (14.3)
INSTALLATION NOTES:
1. MOUNT ANTENNA USING #10-32 SS 100º C’SK
MACHINE SCREWS AND ASSOCIATED
HARDWARE.
2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE FOR
BNC CONNECTOR AND 0.703 (45/64”) (17.9 MM)
∅ HOLE FOR TNC CONNECTOR.
3. PROVIDE 0.213 (5.4 MM) Ø HOLES (6 PLCS)
FOR ATTACHING SCREWS.
4. IF GASKET IS REMOVED, APPLY A LAYER OF ANTICORROSION GREASE BETWEEN AICRAFT
AND ANTENNA BASE.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
MHz cable has BNC connectors and the 406 MHz cable has TNC (antenna) and TPS (ELT)
connectors.
Figure 15 Rod Antenna 110-320 and Blade Antenna 110-328-01 Outlines and Dimensions
25-62-11
Page 58 of 87
JUN 20/13
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
3.74 EST
(95)
3.8 MAX
(97)
10.1 MAX
(257)
4.90
(125)
2.381
(60.5)
0.900 (22.9)
1.189 (30.2)
1.380 (35.1)
1.060 (27.0)
2.05 MAX (52)
0.200 - 0.207 (5.1 - 5.3) Ø (6 PLCS)
SPOT FACED Ø 0.5 (13)
Dimensions in inches (mm)
110-333
3.07 EST
(80)
INSTALLATION NOTES:
1. MOUNT ANTENNA USING #10-32 SS MACHINE
SCREWS AND ASSOCIATED HARDWARE
72548(72/%,11FP
2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE FOR
BNC CONNECTOR AND 0.703 (45/64”) (17.9 MM)
HOLE FOR TNC CONNECTOR.
3. PROVIDE 0.213 (5.4 MM) Ø HOLES (6 PLCS)
FOR ATTACHING SCREWS.
4. APPLY A LAYER OF ANTI-CORROSION BONDING
GREASE BETWEEN AICRAFT AND ANTENNA
BASE.
5. GASKET IS NOT SUPPLIED AND USE IS
OPTIONAL. CONTACT ARTEX AND REQUEST
P/N 183-1622 IF ONE IS DESIRED.
RF CONNECTOR TNC FEMALE
RF CONNECTOR BNC FEMALE
0.500 (12.7)
0.500 (12.7)
C.G.
7.75
(197)
30º
15º
2.70
(69)
2.89
(73)
2.25
(57)
0.562 (14.3)
8.25
(210)
6.000
(152.4)
3.000
(76.2)
1.620 (41.2)
1.500
(38.1)
0.750 (19.1)
1.25 (32)
0.625 (15.9)
0.201 (5.1) Ø (6 PLCS)
RF CONNECTOR BNC FEMALE
Dimensions in inches (mm)
C.G.
INSTALLATION NOTES:
1. MOUNT ANTENNA USING #10-32 SS MACHINE
SCREWS AND ASSOCIATED HARDWARE.
72548(72/%,11FP
2. PROVIDE 0.625 (5/8”) (16 MM) Ø HOLE FOR
BNC CONNECTOR AND 0.703 (45/64”) (17.9 MM)
HOLE FOR TNC CONNECTOR.
3. PROVIDE 0.213 (5.4 MM) Ø HOLES (6 PLCS)
FOR ATTACHING SCREWS.
4. BONDING THROUGH MOUNTING SCREWS
NOT REQUIRED.
5. APPLY A LAYER OF ANTI-CORROSION BONDING
GREASE BETWEEN AICRAFT AND ANTENNA BASE.
6. GASKET NOT SUPPLIED AND USE OPTIONAL.
REQUEST P/N 280-0340 IF ONE IS DESIRED.
1.160 (29.5)
5.580
(141.7)
RF CONNECTOR
TNC FEMALE
ACR ELECTRONICS, INC / ARTEX PRODUCTS
C406-2 (453-5000), C406-2HM (453-5001)
110-337
Figure 16 Blade Antennas 110-333 and 110-337 Outlines and Dimensions
25-62-11
Page 59 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
INSTALLATION NOTES:
1. MOUNT ANTENNA USING #10-32 SS MACHINE SCREWS AND
ASSOCIATED HARDWARE AND TORQUE TO 20 IN/LBS.
2. PROVIDE A 5/8" (.625") DIAMETER HOLE FOR THE BNC CONNECTOR.
3. PROVIDE A 5/8" (.625") DIAMETER HOLE FOR THE TNC CONNECTOR.
4. A LAYER OF ANTI-CORROSION BOUNDING GREASE SHOULD BE
APPLIED BETWEEN THE AIRCRAFT AND THE BASE OF THE ANTENNA
5. THIS ANTENNA IS BOUNDED THRU THE MOUNTING SCREWS.
6. GASKET IS NOT SUPPLIED AND USE IS OPTIONAL.
CONTACT ACR/ARTEX AND REQUEST PART #280-0340 IF ONE IS DESIRED.
7.85
(199)
30º
15º
Dimensions in inches (mm)
Figure 17 Blade Antenna 110-337-11 Outline and Dimensions
RF CONNECTOR BNC FEMALE
1.25 (32)
0.750 (19.1)
1.500
(38.1)
1.620 (41.2)
1.160 (29.5)
THIS IS A BLANK PAGE
0.625 (15.9)
3.000
(76.2)
5.580
(141.7)
6.000
(152.4)
8.25
(210)
RF CONNECTOR
TNC FEMALE
0.201 (5.1) Ø (6 PLCS)
0.562 (14.3)
2.25
(57)
110-337-11
25-62-11
Page 60 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
1.10
(28)
0.044
(1.1)
0.140
(3.6)
1.59
(40)
OUTLINE OF REMOTE
SWITCH BODY
0.1405 (3.57) Ø
USE #28 (3.6) DRILL
(4 PLCS)
NOTE: HATCHED AREA
IS CUTOUT PATTERN
1.04
(26)
1.73
(44)
1.30
(33)
2.00
(51)
1.20
(30)
0.50
(13)
1.70
(43)
1.06
(27)
1.45
(37)
FRONT VIEW
SIDE VIEW
HOLE CUTOUT GUIDE FOR INSTALLATION
OF 345-6196-04 (FRONT VIEW)
RECOMMENDED
CUTOUT PATTERN
DIMENSIONS IN INCHES (MM)
ARTEX
ON
ARM
Press ON
Wait 1 Second
Press ARM
EMERGENCY USE ONLY
Test/Reset
ELT
TOLERANCE: ±0.03 (1)
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-450-803
4. Remote Switch
SUBTASK 25-62-11-450-001
A. Location
NOTE
: This procedure is applicable to the most commonly used remote switch (345-6196-04). If
an optional switch is installed in lieu of this one, the applicable installation instructions
should be consulted.
(1) Select a suitable location for the remote switch assembly.
(2) The switch assembly must be mounted in the cockpit where the pilot can easily reach the
switch and see the LED.
(3) The switch assembly requires a space approximately 2.0 x 1.3 in. (51 x 33 mm) on the panel
surface and behind the panel. See Figure 18.
C406-2 (453-5000), C406-2HM (453-5001)
Figure 18 Remote Switch Outline and Dimensions
SUBTASK 25-62-11-450-002
B. Installation
(1) Mark the cutout on the cockpit panel. See Figure 18.
(2) Fit the switch assembly into the cutout and mark the four screw holes, then remove the
switch.
(3) Drill the screw holes with a #28 or 3.6 mm drill.
(4) Install the switch assembly using the 4-40 x ½ in. pan head screws, nuts and lock washers
provided in the remote switch installation kit (455-6196).
NOTE
: Step 4 may be accomplished after wiring is completed and the harness plug has been
plugged into the switch assembly in accordance with the requirements of SUBTASK
25-62-11-450-010 on page 70. If such is the case, perform a fit check at this time.
(5) Apply the “For Aviation Emergency Use Only/Unauthorized Use Prohibited” placard (591-
0428), provided in the installation kit, as close to the switch as practical.
25-62-11
Page 61 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
+
ARTEX
+
-
-
1.68
(43)
1.75
(45)
1.115
(28.3)
PANEL MOUNTING NUT
0.445
(11.3)
FRONT VIEW
SIDE VIEW
REAR VIEW
Dimensions are
reference only
130-4004
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-450-804
5. Buzzer
SUBTASK 25-62-11-450-001
A. Location
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
: PLACING THE BUZZER IN THE COCKPIT IS NOT RECOMMENDED DUE TO THE
POTENTIAL FOR DISTRACTION. THE BUZZER PRODUCES A LOUD, SIREN-TYPE
SOUND WHEN THE ELT IS ACTIVATED. SINCE THE BUZZER OPERATES IN TANDEM
WITH THE COCKPIT LED, IT WOULD ONLY SERVE AS A REDUNDANT WARNING
INDICATOR IN THE COCKPIT.
(1) Select a suitable location for the buzzer.
NOTE
: The buzzer may be located anywhere in the aircraft; however, the recommended
location is near the ELT, as the buzzer is loud enough to be heard outside the aircraft
when the engine(s) is not running. When the engine(s) is running, the LED on the
cockpit remote switch assembly will warn the pilot the ELT is active.
SUBTASK 25-62-11-450-002
B. Installation
(1) Fabricate a bracket suitable for supporting the buzzer. See Figure 19.
NOTE
: Refer to the aircraft manufacturer’s written instructions or AC 43.13-2, as applicable,
for approved bracket fabrication and installation methods.
Figure 19 Buzzer Outline and Dimensions
(2) Attach the bracket to the airframe such that the buzzer is adequately supported and does not
show any significant evidence of distorting the airframe skin.
(3) Install the buzzer in the bracket.
(a) Remove the panel mounting nut and insert the buzzer in the bracket.
(b) Install the panel mounting nut and tighten it securely.
25-62-11
Page 62 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TASK 25-62-11-450-805
6. Wiring
SUBTASK 25-62-11-990-001
A. General Considerations and Recommendations
CAUTION
CAUTION
CAUTION
(1) The following wiring and grounding considerations and recommendations are applicable:
: IF GROUND OR OTHER CONNECTIONS ARE BROKEN OR OTHERWISE DAMAGED, THE
ELT IS STILL CAPABLE OF AUTOMATIC ACTIVATION; HOWEVER, THE COCKPIT
REMOTE SWITCH MAY BE INCAPABLE OF RESETTING THE ELT AND OPERATION MAY
NOT BE INDICATED ON THE REMOTE SWITCH LED.
: INCORRECT TERMINATION OF THE WIRING IN THE CONNECTORS MAY DAMAGE THE
ELT, CAUSE TRANSMISSION ISSUES, OR RESULT IN A NON-FUNCTIONING REMOTE
SWITCH. VERIFY THE WIRING AGAINST THE WIRING DIAGRAM AND PERFORM A
CONTINUITY CHECK TO CONFIRM GOOD CONNECTIONS AND PROPER PIN
LOCATIONS.
: TO PREVENT INADVERTENT ELT ACTIVATION OR POSSIBLE COMPONENT DAMAGE,
DO NOT CONNECT THE HARNESS TO THE ELT OR COCKPIT REMOTE SWITCH UNTIL
ALL POWER AND GROUND WIRING CONNECTIONS ARE COMPLETED.
(a) Minimum 22 AWG wire size.
(b) Shielding is recommended to help prevent EMI and RF interference.
(c) Use high quality conductor meeting MIL-W-16878, M22759, M27500, or a commercial
equivalent acceptable for use in aircraft applications.
(d) Provide a “Drip Loop” in the remote switch harness connection to the ELT to divert
moisture from the connector. See TASK 25-62-11-990-805 on page 21 for a definition.
(e) Provide a “Service Loop” in the remote switch harness connection to the remote switch
assembly, such that the assembly can be withdrawn from the panel far enough to easily
disconnect the harness plug. See TASK 25-62-11-990-805 on page 21, for a definition.
(f) ELT and remote switch grounds must be common to aircraft ground.
25-62-11
Page 63 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
PIN 12
PIN 10
PIN 1
PIN 3
151-5012
USE MALE
CRIMP PINS
(151-6627)
PIN 1
PIN 7
PIN 9
PIN 3
151-5009
USE FEMALE
CRIMP PINS
(151-6628)
REMOTE SWITCH (REF.)
ELT AND MOUNTING
TRAY (REF.)
MOUNTING FRAME
TOP COVER (REF.)
MOUNTING
FRAME CAP
(452-5052)
REMOTE SWITCH
HARNESS
Tighten thumbscrews
no more than 18 lb-in
(2.03 Nm)
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-450-001
B. Remote Switch Harness Fabrication
(1) See Figure 20.
Figure 20 Remote Switch Harness Arrangement
(2) Fabricate a 5-wire harness long enough to reach from the ELT to the cockpit remote switch,
allowing enough slack to provide a drip loop at the ELT end and a service loop at the cockpit
remote switch end. See "Figure 21 Remote Switch Harness Wiring Diagram” on page 66.
NOTE
: If an ELT/NAV Interface (453-6500) is being installed with the ELT, refer to the “ELT/
NAV Interface Abbreviated Component Maintenance Manual” (570-4602) for
(a) Strip approximately 0.15 in. (3 mm) of insulation from the ends of each of the five cable
(b) Dress and tin the bare wires to prevent the strands from fraying during terminal
(3) Three additional wires are required. See "Figure 21 Remote Switch Harness Wiring Diagram”
additional wiring instructions.
wires.
crimping operations.
on page 66.
(a) Fabricate a ground wire long enough to reach from Pin 11 of the harness ELT receptacle
to aircraft ground.
25-62-11
Page 64 of 87
JUN 20/13
NOTE
: This wire will be crimped in the same pin as the wire running from Pin 11 of the
ELT receptacle to the cockpit remote switch plug. Alternatively, the wires may
ACR ELECTRONICS, INC / ARTEX PRODUCTS
LIGHT
RESET 1
RESET 2
EXTERNAL ON
G-SWITCH LOOP
G-SWITCH LOOP
GROUND
HORN POWER
HORN GROUND
1
3
6
7
12
5
8
9
10
11
2
4
8
5
2
7
1
3
6
9
+14 VDC
+28 VDC
ELT
RECEPTACLE
COCKPIT REMOTE
SWITCH PLUG
PIN INSERTION END VEIW
OF MOLEX RECEPTACLE FOR ELT.
HOLE NUMBERING IS IDENTICAL
TO THAT INSCRIBED ON ACTUAL
RECEPTACLE. ORIENTATION
SHOWN IS SAME AS INSERTION
ORIENTATION FOR ELT.
PIN INSERTION END OF MOLEX
PLUG FOR REMOTE SWITCH
ASSEMBLY. HOLE NUMBERING
IS IDENTICAL TO THAT INSCRIBED
ON ACTUAL PLUG. ORIENTATION
SHOWN IS SAME AS INSERTION
ORIENTATION FOR INSTALLED
SWITCH.
HORN
APPLY EITHER +14 V TO PIN 1 OR
+28 V TO PIN 3, BUT NOT BOTH
NOTE: BYPASS THE AIRCRAFT
AND AVIONICS MASTER SWITCHES.
CONNECT POWER DIRECTLY TO
BATTERY WITH A 1-AMP IN-LINE
FUSE OR CONNECT TO AIRCRAFT
CLOCK CIRCUITRY. MAXIMUM
CIRREMT REQUIRED IS ABOUT
100 mA. CIRCUIT MUST BE FUSED.
NOTE: PINS 6 AND 9 OF REMOTE SWITCH ARE
INTERNALLY TIED. IF AIRCRAFT GROUND
INTEGRITY BETWEEN THE ELT AND REMOTE
SWITCH CANNOT BE GUARANTEED, THEN
REMOTE SWITCH PIN 6 IS WIRED TO ELT PIN 11,
OTHERWISE THE CONNECTION IS OPTIONAL.
USE MINIMUM
22 AWG WIRE
9
8
7
6
5
4
3
2
1
3
2
1
4
7
5
8
6
9
10
11
12
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
be spliced in a manner acceptable to the aircraft manufacturer, or as described
in AC 43.13-1, Paragraph 11-167.
(b) Fabricate ground wire long enough to reach from Pin 9 of the remote switch plug to
aircraft ground.
(c) Fabricate a power wire long enough to reach from the remote switch plug (Pin 1 or Pin
3) to the selected aircraft power source.
(d) Prepare the wires as described in Steps (3)(a) and (3)(b).
Figure 21 Remote Switch Harness Wiring Diagram
(4) Fabricate two wires of sufficient length to reach from the harness ELT receptacle to the
buzzer.
NOTE
(a) Prepare the wires as described in Steps (3)(a) and (3)(b).
(5) Crimp male terminal pins (151-6627) on the harness wire ends at the ELT, as follows:
NOTE
(a) The ground wire in the same pin as the harness wire designated to terminate in Pin 11.
(b) On each of the remaining wire ends at the harness ELT end.
: These wires provide power and ground for the buzzer. Use appropriate means of
identification for the wires, such that the wires can be readily identified.
: Use Molex crimp tool 63811-3300, or an equivalent tool for 0.062 in. terminal pins.
Make a note of the wire identification for later reference.
(c) The buzzer power and ground wires.
25-62-11
Page 65 of 87
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(6) Crimp appropriately sized ring terminals on the buzzer ends of the buzzer power and ground
wires.
(7) Crimp an appropriately sized ring terminal on the airframe end of the Pin 11 ground wire.
(8) Crimp an appropriately sized ring terminal on the remote switch power source wire end.
NOTE
: If desired, the power wire may be spliced to a power source in a manner acceptable
to the aircraft manufacturer, or as described in AC 43.13-1, Paragraph 11-167.
(9) Crimp female terminal pins (151-6628) to the cockpit remote switch end, as follows:
NOTE
: Use Molex crimp tool 63811-3300, or an equivalent tool for 0.062 in. terminal pins.
(a) Each harness wire.
(b) Remote switch ground wire.
(c) Remote switch power wire.
(10) Bundle the wiring into a complete harness, with breakouts as appropriate, such that the wiring
can be properly supported and attached to the airframe. Refer to the aircraft manufacturer’s
written instructions or AC 43.13-1, Chapter 11, § 9 through 12, as applicable.
SUBTASK 25-62-11-450-002
C. ELT 12-Pin Receptacle Installation
(1) Feed the harness wires on the ELT end through the mounting frame cap assembly (452-
5052). See "Figure 22 Remote Harness Wiring at ELT End” on page 68.
(2) Feed the buzzer wires on the ELT end through the mounting frame cap.
(3) Fabricate a short jumper wire, approximately 1.5 in. (38 mm) long.
(a) Strip approximately 0.15 in. (3 mm) of insulation from both ends of each of the wire.
(b) Dress and tin the bare wire ends to prevent the strands from fraying during terminal
crimping operations.
(c) Crimp male terminal pins (151-6627) to each of the wire ends, using Molex crimp tool
63811-3300, or an equivalent tool for 0.062 in. terminal pins.
(4) Insert the wiring pins in the harness ELT 151-5012 Molex 12-pin receptacle. See "Figure 21
Remote Switch Harness Wiring Diagram” on page 66.
CAUTION
(a) Insert the jumper ends in Pin 5 and Pin 8 of the receptacle.
: THE ELT WILL NOT AUTOMATICALLY ACTIVATE IF THE JUMPER (G-SWITCH
LOOP) IS NOT PROPERLY INSTALLED IN THE HARNESS ELT RECEPTACLE.
NOTE
: Terminal pins may be removed from the receptacle using Molex extraction tool
11030002, or equivalent.
(b) Insert the harness ELT wire ends into the receptacle, making a record of wire
identification and pin relationships for reference when terminating the harness wires in
the remote switch plug.
Page 66 of 87
25-62-11
JUN 20/13
ACR ELECTRONICS, INC / ARTEX PRODUCTS
12-PIN MOLEX
RECEPTACLE
PIN 1
NOTE: FEED THE WIRE BUNDLE THROUGH THE MOUNTING
FRAME CAP HOLE PRIOR TO INSERTING THE PINS INTO THE
RECEPTACLE
TO COCKPIT REMOTE
SWITCH AND GROUND
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
NOTE: The pin with the airframe ground wire terminated in it, MUST be inserted in Pin
11.
(c) Insert the buzzer power and ground wires in Pin 2 (+) and Pin 4 (–) of the receptacle,
respectively.
Figure 22 Remote Harness Wiring at ELT End
SUBTASK 25-62-11-450-003
D. Cockpit Remote Switch 9-Pin Plug Installation
(1) Inert the wiring pins in the 151-5009 Molex 9-pin cockpit remote switch plug. See "Figure 21
Remote Switch Harness Wiring Diagram” on page 66.
(a) Insert each harness female pin into the plug.
NOTE
NOTE
: Refer to the wire identification and pin relationships recorded in Step C.(4)(b).
: Terminal pins may be removed from the plug using Molex extraction tool
11030002, or equivalent.
(b) Insert the remote switch power wire female pin into Pin 1 or Pin 3 of the plug, as
appropriate for the selected 14V or 28V power source.
(c) Insert the remote switch ground wire into Pin 9 of the plug.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-450-004
E. Wiring Installation
(1) Route the remote switch harness wire bundle and breakout wiring through the airframe.
(2) Route the two antenna coax cables through the airframe.
NOTE
: Longer coax cables, up to 20 feet (6.1 m), may be fabricated if the cables provided
are too short. Use RG-142 or RG-400 coax cable.
(3) Support the wiring and coax cables by clamping or other suitable means, such that the wiring
and cables are properly supported and protected from chaffing and strain. Refer to the aircraft
manufacturer’s written instructions or as described in AC 43.13-1, Chapter 11, § 9 through 12,
as applicable.
SUBTASK 25-62-11-450-005
F. Antenna Connections
(1) Connect the two coax cables to the antenna, making sure the cables are routed and supported
such that there is no tensile load (i.e., strain) on the connections.
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-450-006
G. Cockpit Remote Switch Power Connection
(1) Connect the remote switch power wire. If the wire is spliced, fabricate the splice in a manner
acceptable to the aircraft manufacturer or as described in AC 43.13-1, § 13.
NOTE
: The power source provides energy for the remote switch assembly LED, but has no
effect on switch functions, as the switch will control the ELT with or without power.
NOTE
: Power should be connected directly to the battery using a 1-amp in-line fuse or
circuit breaker; or an alternate un-switched source, such as the aircraft clock
circuitry.
SUBTASK 25-62-11-450-007
H. Remote Switch Alternate Power Source
(1) If the aircraft does not have an electrical system (i.e., no battery), it is permissible to fabricate
a substitute power source for the LED, as follows:
(a) Connect three suitably supported 9V alkaline batteries together in series.
(b) Connect the positive (+) side to Pin 3 of the remote switch connector.
(c) Connect the negative (–) side to aircraft ground, such that the circuit is complete.
(d) Check the battery voltage periodically and replace the batteries every two years.
(e) Note the alteration in the aircraft logbook.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
SUBTASK 25-62-11-450-008
I. Airframe Ground Connections
(1) Connect the ground wires to the airframe in accordance with the aircraft manufacturer’s
written instructions or as described in AC 43.13-1, Chapter 11, § 15, as applicable. See "Figure
21 Remote Switch Harness Wiring Diagram” on page 66.
SUBTASK 25-62-11-450-009
J. Buzzer Connections
(1) Connect the power wire to the buzzer positive (+) terminal.
(2) Connect the ground wire to the buzzer negative (–) terminal.
SUBTASK 25-62-11-450-010
K. Remote Switch Final Installation
(1) Insert the harness plug into the remote switch receptacle.
(2) Install the remote switch assembly in accordance with SUBTASK 25-62-11-450-002 on page
62.
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PROTECTIVE TOP
COVER ASSY
MOUNTING FRAME
CAP ASSY
ELT MAIN
ASSY
MOUNTING
TRAY ASSY
CONNECT COAX
CABLE
CONNECT HARNESS
1
TIGHTEN THUMBSCREW
(2 PLCS)
Tighten to no more than
18 lb-in (203 Ncm)
2
3
5
6
7
NOTE: Coax cables and
wiring harness not
shown for clarity.
CONNECT COAX
CABLE
4
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-410-802
7. ELT Installation
SUBTASK 25-62-11-410-001
A. Installation and Test
(1) See Figure 23.
C406-2 (453-5000), C406-2HM (453-5001)
Figure 23 ELT Installation Sequence
(2) Verify the ELT local switch is in the “OFF” position.
(3) Insert the ELT into the mounting tray at an angle, such that the locking ears at the end
opposite the direction-of-flight arrow fit into the mounting tray locking slots.
(4) Press the ELT down until it is fully seated in the mounting tray.
(5) Install the protective top cover assembly (452-3052) on the ELT by fitting the cover locking
slots over the locking ears on the ELT.
(6) Push the cover toward the connector end of the ELT and seat it down in place on the ELT.
(7) Route the antenna coax cables through the appropriate mounting frame cap access holes.
(8) Connect the antenna coax cables to the ELT.
(9) Connect the 12-pin harness receptacle to the ELT.
(10) Slide the mounting frame cap into place over the mounting tray and protective top cover.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(11) Secure the mounting frame cap to the mounting tray with the thumbscrews and tighten them
to no more than 18 lb-in (203 N•cm).
(12) Tie up excess slack in the harness and coax cables, such that they form drip loops and there is
enough slack, approximately 5 in. (127 mm), to allow the mounting frame cap to be easily
pulled back.
NOTE
: Steps 1 through 11 are applicable any time the ELT has been removed and
undergoes reinstallation. Step 12 is only applicable at initial installation or if the
wiring or coax cables have been disturbed.
(13) Test the ELT installation in accordance with the requirements of SUBTASK 25-62-11-750-011
on page 47.
NOTE
: It is very important the cockpit remote switch LED immediately begins flashing
continuously upon ELT activation. If the LED fails to start flashing, recheck the
interface wiring and connections between the ELT and the cockpit remote switch.
NOTE
: If verification of the digital message (i.e., 406 MHz burst) is desired, follow the
procedures outlined in SUBTASK 25-62-11-750-009 on page 46.
SUBTASK 25-62-11-450-001
B. Harness ELT Receptacle Sealing
(1) Seal the harness receptacle at the ELT end to prevent moisture from penetrating the
connection, thus preventing water from beading up and causing bridging between connector
pins resulting in possible activation of the ELT. Use the following procedure:
NOTE
: Perform the sealing process once all tests have been satisfactorily completed and all
harness connections have been verified to be correct.
(a) Remove the mounting frame cap from the ELT.
(b) Unplug the receptacle from the ELT or pull the receptacle free of the mounting frame
cap, as applicable.
(c) Seal the back of the receptacle with GE RTV 162, or equivalent, such that moisture
cannot penetrate the backside of the receptacle around the terminal pins.
(d) Apply Dow Corning® 4 Electrical Insulating Compound, or an equivalent meeting MIL-S-
8660C, around the receptacle pins, such that the pin area is filled with compound.
(e) Plug the harness receptacle into the ELT.
(f) Wipe up excess sealing compound.
(g) Reinstall the mounting frame cap torquing the thumbscrews to no more than 18 lb-in.
(203 N•cm).
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-410-002
C. Installation Documentation
(1) Make appropriate logbook (i.e., aircraft records) entries and submit FAA Form 337, along with
any supporting data required by the FAA for approval of the installation, as applicable.
NOTE
: Refer to TASK 25-62-11-410-801 on page 54 for additional information on installation
approvals.
(2) In countries other than the United States, make appropriate aircraft records entries and
submit documentation as required for installation approval in accordance with national
regulatory authorities.
C406-2 (453-5000), C406-2HM (453-5001)
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NOTE: Plug is
recessed in
ELT Assembly
RTV puddle
ELT ASSEMBLY
BATTERY PACK
SCREW WITH O-RING
P/N 217-0606
(4 PLCS)
RUBBER
SEAL
CONNECT
CONNECT
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TASK 25-62-11-450-806
8. Battery Pack Installation
SUBTASK 25-62-11-450-001
A. Battery Reinstallation
CAUTION
: THE BATTERY PACK CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESD)
COMPONENTS AND IT MUST BE HANDLED WITH CARE. IF POSSIBLE, WEAR A
GROUNDED WRIST STRAP WHEN HANDLING THE BATTERY PACK DURING
INSTALLATION ACTIVITIES. TAKE PARTICULAR CARE TO AVOID TOUCHING THE
EXPOSED CIRCUIT BOARD AND CONNECTOR PINS ON THE BOARD.
(1) This subtask applies to reinstallation of an existing battery that was removed for inspection
and testing.
(2) See Figure 24.
Figure 24 Battery Pack Installation
(3) Apply a thin coating of non-petroleum based silicone grease, such as GE G-635, to the rubber
seal to facilitate installation and allow the ELT and battery pack to slide together without
binding on the rubber seal.
(4) Lay the battery pack and ELT on their sides, such that the two components are aligned, but
separated enough to allow the electrical connections to be made.
(5) Connect the ELT lead 8-pin connector to the header on the battery pack circuit board.
(6) Connect the power harness 2-pin connector to the recessed connector inside the ELT body.
Page 73 of 87
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SWITCH/CONNECTOR
END
1
2
3
4
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(7) Reset the ELT by toggling the ELT local control switch to “ON” and back to “OFF” after 1-2
seconds.
NOTE
: This step is necessary because the ELT will occasionally activate when power is
connected to it in Step 6.
(8) Fit the battery pack into place on the ELT, while dressing the wires away from the standoffs to
avoid pinching the wires between the standoffs and battery pack.
(9) Turn the battery pack bottom face up to facilitate installing the screws, while securely holding
the ELT and battery pack together.
(10) Install the four battery pack retaining screws about half way (i.e., leave them loose).
(11) Tighten and torque the screws as shown in Figure 25. Torque to 6-8 lb-in (68-90 N•cm).
Figure 25 Battery Pack Retaining Screw Tightening Pattern
(12) Perform an ELT self-test as follows:
(a) Set the ELT local control switch in the “ON” position. The LED will begin flashing every 3-
4 seconds.
(b) Return the switch to the “OFF” position after 1-2 seconds. If the ELT is working properly,
the LED will stay on for approximately 1 second and then flash the following expected
error codes, which should be ignored.
1
1-flash and 3-flash errors, which are generated because the ELT is not installed
and connected to an antenna, etc.
2
A 5-flash error will be indicated if the ELT is programed with a location protocol,
and is generated because the ELT is not connected to the navigation system and
receiving position data.
(c) If a 7-flash error code is indicated, there is a problem with the battery or battery
connection wiring. Refer to Table 6 on page 49.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-450-002
B. New Battery Installation
C406-2 (453-5000), C406-2HM (453-5001)
CAUTION
(1) This subtask applies to installation of a new (i.e., replacement) battery.
(2) Verify the bottom of the ELT is clean and free of battery corrosion residue. Clean as
(3) Remove the paper backing from the rubber seal at the connector end of the battery pack.
(4) Perform the procedure outlined in SUBTASK 25-62-11-450-001 on page 74.
(5) Place a new battery expiration date label on the ELT mounting frame cap or other visible
(6) Enter the pertinent battery replacement information in the logbook (i.e., aircraft records) and
TASK 25-62-11-410-803
: DO NOT USE CONTACT CLEANER ON ELT COMPONENTS. SUCH CHEMICAL AGENTS
CAN BE HIGHLY DESTRUCTIVE TO THE MOUNTING HARDWARE AND ELT HOUSING,
CAUSING CRACKING, FRACTURING AND OTHER DAMAGE.
necessary.
location.
NOTE
: The new label is supplied with the new battery pack.
fill out any other required documentation.
9. Helicopter Installations - Special Considerations
SUBTASK 25-62-11-990-001
A. Background
(1) There are few guidelines, aside from experience, regarding the best way to mount an ELT in
helicopters.
(2) Before the availability of multi-axis G-switch modules, manufacturers advised installing ELTs
with the sensitive axis pointing approximately 45° downward from the normal forward
direction of flight.
(a) This mounting attitude was adapted due to a combination of the directional sensing
limitations of a single-axis G-switch and the flight characteristics of helicopters.
(b) Mounting the ELT in this attitude and orientation is currently specified by CAR, Part 5,
Subpart 551.104.
(c) Experience has indicated this mounting angle tends to preload the G-switch and
“nuisance” activation can occur as a result of severe aircraft maneuvers, and abrupt
takeoffs and landings.
(3) ACR Electronics does not recommend installing ELTs designed with a single-axis G-switch in
helicopters due the limitations and issues cited above.
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+Y
-Y
-X
+X
+Z
-Z
FWD
0° TO 25°
FLIGHT
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-002
B. Recommendations
(1) ACR Electronics recommends installation of the C406-2HM ELT in helicopters. The C406-2HM
ELT is equipped with a 5-axis G-switch module in addition to the usual primary G-switch,
which is oriented to the direction of flight. See Figure 26.
C406-2 (453-5000), C406-2HM (453-5001)
Figure 26 ELT Orthogonal Axes
(2) The six-axis coverage of the C406-2HM design accommodates the flight characteristics of
helicopters, while allowing “normal” installation and eliminating or significantly reducing
“nuisance” ELT activations.
SUBTASK 25-62-11-410-001
C. Orientation
(1) Mount the C406-2HM ELT parallel to the waterline of the fuselage, along the longitudinal axis,
with the direction-of-flight arrow on the ELT pointing forward. See Figure 27.
NOTE
: This is the orientation of the primary G-switch in the ELT.
(2) The ELT may be angled downward as much as 25°, if necessary.
NOTE
: Keep in mind the steeper the mounting angle, the more pre-load on the primary G-
switch and the increased likelihood of “nuisance” activations.
(3) All other installation requirements contained herein are applicable and must be adhered to.
Figure 27 Orientation of ELT for Helicopter Installations
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
APPENDIX A – ELT REGISTRATION
TASK 25-62-11-990-801
1. Background Information
SUBTASK 25-62-11-990-001
A. Hex ID Code
(1) Each 406 MHz ELT is programmed with a unique hex ID code (i.e., registration code) that is
transmitted to the SAR satellite system. At a minimum, this code provides information
regarding:
(a) Unique aircraft or ELT identification,
(b) Country of origin, and
(c) Latitude and longitude position data, if equipped with a navigation interface device.
SUBTASK 25-62-11-990-002
B. Reason for Registration
(1) ELT registration aids the Rescue Coordination Center (RCC) in determining if an actual
emergency exists by accessing a database containing the registration information, which
facilitates inquiries as to the whereabouts of the aircraft, existence of a flight plan, etc.
(a) Owner’s name,
(b) Address,
(c) Telephone number,
(d) Aircraft type, and registration number.
SUBTASK 25-62-11-990-003
C. Registration Information Resources
(1) Refer to COSPAS-SARSAT documents G.005 and S.007 for information regarding ELT
programming and registration. These documents are available at www.cospas-sarsat.org.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-990-802
2. Registration
SUBTASK 25-62-11-990-001
A. Responsibility
(1) It is the responsibility of the aircraft owner to register the ELT.
(a) If an ELT is moved to a different aircraft (i.e., an aircraft other than the one it was
originally installed on), and/or the aircraft is registered in a new country, the ELT must
be re-registered.
(b) If the aircraft is registered in a new country, the ELT must be re-registered.
(c) The product label must re-marked with the new HEX ID code to indicate new
programming, if applicable.
SUBTASK 25-62-11-990-002
C406-2 (453-5000), C406-2HM (453-5001)
B. Required Information
(1) The following information is required when registering an ELT:
(a) The unique Hex ID code printed on the ELT product label,
(b) The information listed in SUBTASK 25-62-11-990-002 on page 78.
(2) The information (i.e., address, telephone number, etc.), filed as part of the registration
process, should be kept up to date.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-003
C. Where to Register
(1) In the United States, the National Oceanic and Atmospheric Administration (NOAA) is the
registration agency.
(2) Specific registration web sites and information may be found at:
(a) The Artex products web site at www.acrartex.com, which has links to on-line registration
sites and also a link to registration forms and instructions for a number of countries.
(b) An ELT may also be registered in the United States by going directly to the NOAA ELT
registration web site at www.beaconregistration.noaa.gov.
NOTE
: NOAA may also be contacted by mail at:
US MAIL ONLY FEDEX OR UPS ONLY
SARSAT Beacon Registration SARSAT Beacon Registration
C406-2 (453-5000), C406-2HM (453-5001)
NSOF, E/SPO53 NSOF, E/SPO53
1315 East West Highway 4231 Suitland Road
Silver Spring, MD 20910-9684 Suitland, MD 20746-4304
or by phone at 1-888-212-7283 or 301-817-4565.
(3) In other countries, the national civil aviation authority in the applicable country should be
contacted to obtain registration information.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-62-11-990-801
1. Introduction
SUBTASK 25-62-11-990-001
A. Purpose
(1) This illustrated parts list (IPL) illustrates and lists the spare parts, with attaching hardware,
applicable to the C406-2 Series ELT.
(2) Parts and components not listed herein, are not field replaceable and ELT repairs requiring
parts outside the scope of this manual must be accomplished by the manufacturer.
SUBTASK 25-62-11-990-002
B. IPL Usage Guide
C406-2 (453-5000), C406-2HM (453-5001)
ILLUSTRATED PARTS LIST
(1) If the part number is not known:
(a) Find the part in the IPL Figure illustration.
(b) Note the item number assigned to the part.
(c) Refer to the associated parts list and find the item number in the “Fig # & Item” column.
(2) If the part number is known:
(a) Refer to the parts list and find the part in the “Part #” column.
(b) Note the figure number and item number assigned to the part.
(c) Refer to the illustration in the applicable IPL figure to find attaching hardware and
related assembly parts.
(3) In cases where multiple item numbers are shown on an illustration for the same item, there is
more than one part number option associated with that item.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
TASK 25-62-11-990-802
2. Manufacturer Name and Address
SUBTASK 25-62-11-990-001
A. Ordering Information
(1) Approved parts may be ordered from ACR Electronics, or any authorized dealer.
CONTACT INFORMATION
Sales, ACR Electronics, Inc / Artex Products
5757 Ravenswood Rd.
Fort Lauderdale, FL 33312-6645, USA
Phone: (954) 981-3333
Fax: (954) 983-5087
TASK 25-62-11-990-803
3. Explanation of Detailed Parts List Entries
SUBTASK 25-62-11-990-001
A. Fig # & Item Column
(1) The first number at the top of the column is the figure number of the corresponding
illustration.
(2) The right hand number is the item number in the associated figure.
(3) A dash (–) in front of an item means the part is not illustrated.
(4) Alpha-variants A through Z (except I and O) are assigned to item numbers, when necessary to
identify added parts, alternate parts, and service bulletin modified parts.
SUBTASK 25-62-11-990-002
B. Part # Column
(1) This column contains the manufacturer’s part number for each part.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SUBTASK 25-62-11-990-003
C. Nomenclature Column
(1) This column contains descriptive nomenclature for each part, service bulletin numbers
affecting the part, and obsolete part numbers.
(2) The indenture system used in the “Nomenclature” column indicates the relationship of one
part to another, as follows:
Attaching Parts for End Item or Major Assembly
C406-2 (453-5000), C406-2HM (453-5001)
1 2 3
End Item or Major Assembly
ATTACHING PARTS
***
. Detail Parts for End Item or Major Assembly
. Subassemblies
ATTACHING PARTS
. Attaching Parts for Subassemblies
***
. . Detail Parts for Subassemblies
ATTACHING PARTS
. . Attaching Parts for Detail Parts
***
(3) Assemblies, subassemblies, and detail parts subject to modification, deletion, addition, or
replacement by an issued service bulletin, are annotated to indicate both pre- and postservice bulletin configurations. The term (PRE SB XXXX) in the “Nomenclature” column
designates the original configuration, and the term (POST SB XXXX) identifies assemblies and
parts after the modification has been completed.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
(4) The terms defined below are used when applicable to indicate the interchangeability of parts.
TERM ABBREVIATION DEFINITION
The listed part is alternate to, and interchangeable
Alternate ALT
with, other parts within the same item number
variant group or other item numbers if
designated.
Superceded By SUPSD BY
Supersedes SUPSDS
Replaced By REPLD BY
Replaces REPLS
SUBTASK 25-62-11-990-004
D. UPA (Units Per Assembly) Column
(1) The quantity shown in this column represents the units required for one next higher assembly
or, when referring to attaching parts, the quantity to attach one such item.
(2) The abbreviation RF (reference) indicates the end item assembly is listed for reference
purposes.
The part is replaced by and is not interchangeable
with the item number designated in the notation.
The part replaces and is not interchangeable with
the item number designated in the notation.
The part is replaced by and is interchangeable
with the item number designated in the notation.
The part replaces and is interchangeable with the
item number designated in the notation.
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
04
05
02
01
03
06
TASK 25-62-11-990-804
4. Detailed Parts List
Figure 28 C406-2 Series ELT Main Assembly and Installation
ACR ELECTRONICS, INC / ARTEX PRODUCTS
C406-2 (453-5000), C406-2HM (453-5001)
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
FIG # ITEM PART # 1234 NOMENCLATURE UPA
28 01 452-3052 Protective Top Cover Assembly 1
02 452-5052 Mounting Frame Cap Assembly 1
03 452-5050 Mounting Tray Assembly 1
ATTACHING PARTS
– 201-0810 Screw, PHP 8-32 x 5/8” SS 4
– 246-0008 Washer, Flat 1/2” SS #8 4
– 247-0800 Washer, Lock Internal Tooth SS #8 4
– 241-0832 Nut, 8-32 x 1/4” Hex SS 4
***
04 453-5000 C406-2 Main Assembly 1
05 453-5001 C406-2HM Main Assembly 1
***
– 591-0999 . Label, Hex Code 1
– 591-0429 . Label, Country Code 1
***
06 452-0133 . 406 Lithium Battery Pack 1
ATTACHING PARTS
– 217-0606 . Screw, with O-Ring 4
***
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WIRING HARNESS
(Ref. Only)
02
03
04
01
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
Figure 29 Electrical Components
FIG # ITEM PART # 1234 NOMENCLATURE UPA
29 01 345-6196-04 Switch, Cockpit Remote 1
ATTACHING PARTS
– 201-0408 Screw, PHP 4-40 x 1/4” SS 4
– 247-0400 Washer, Internal Lock SS #4 4
– 241-0440 Nut, 4-40 x 1/4” Hex SS 4
***
– 591-0428 . Label, ELT Cautionary Use Advisory 1
***
02 151-5009 Plug, 9-Pin 1
***
– 151-6628 . Terminal, Crimp Female 0.062 Dia. 9
***
03 151-5012 Receptacle, 12-Pin 1
***
– 151-6627 . Terminal, Crimp Male 0.062 Dia. 12
***
04 130-4004 Buzzer (ELT Audible Alert) 1
***
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ACR ELECTRONICS, INC / ARTEX PRODUCTS
03
04
02
01
05
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
Figure 30 Antennas
FIG # ITEM PART # 1234 NOMENCLATURE UPA
30 01 110-337 Antenna, 406 Blade (319 Dual Input) 1
02 110-328-01 Antenna, 406 Blade (Dual Input) 1
03 110-333 Antenna, Tri-Band Blade, White (Dual Input) 1
04 110-320 Antenna, Tri-Band Rod (Dual Input) 1
05 110-337-11 Antenna, 406 Blade w/prt. edge 1
***
– 611-6013-04 . Cable, Coax BNC to BNC (6 ft.) 1
– 611-6052 . Cable, Coax TNC to TPS (6 ft.) 1
***
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