ACR Electronics ELT/NAV INTERFACE User Manual
ELT/NAV INTERFACE
Description, Operation, Installation and Maintenance Manual
This manual includes data for the equipment that follows:
Component
ELT/NAV Interface 453-6500 N/A
Part No. Model No.
ARTEX PRODUCTS / ACR ELECTRONICS, INC.
5757 Ravenswood Rd, Ft. Lauderdale, FL 33312
25-69-10
Cage Code: 60253
Page 1 of 58
APR 30/12
570-4602 Rev. H
Initial Issue FEB 10/1998
ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
453-6500
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, Inc. 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, Inc. makes
no warranty with regard to the documentation or data contained herein. ACR Electronics, Inc. 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, Inc. 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, Inc.
5757 Ravenswood Rd, Fort Lauderdale, FL 33312. Telephone (954) 981-3333
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RECORD OF REVISIONS
REV NO. DCN NO. DCN DATE REV NO. DCN NO. DCN DATE
- RELEASE Feb 10/1998
A ECO 811 Apr/24/1998
B ECO 887 Jul 23/1998
B ECO 948 Oct 14/1998
C ECO 1167 Oct 15/1999
D ECO 1394 May 15/2000
D DCN 1748 Jul 19/2001
D DCN 1791 Sep 19/2001
E DCN 1848 Nov 26/2001
E DCN 1968 Apr 12/2002
E DCN 2033 Jun 18/2002
E DCN 2702 Jan 23/2006
F DCA W9414 Apr 06/2010
G ECO 14756 Jul 28/2011
H ECO 15051 Apr 30/2012
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SERVICE BULLETIN LIST
SERVICE
BULLETIN NO
ISSUE
DATE
SUBJECT
MANUAL
REV NO
MANUAL
REV DATE
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LIST OF EFFECTIVE PAGES
SUBJECT PAGE DATE SUBJECT PAGE DATE
Title Page 1 Apr 30/12 30 Apr 30/12
Notices 2 Apr 30/12 Test and Fault Isolation 31 Apr 30/12
Record of Revisions 3 Apr 30/12 32 Apr 30/12
4 BLANK 33 Apr 30/12
Service Bulletin List 5 Apr 30/12 34 Apr 30/12
6 BLANK 35 Apr 30/12
List of Effective Pages 7 Apr 30/12 36 Apr 30/12
8 BLANK 37 Apr 30/12
Table of Contents 9 Apr 30/12 38 Apr 30/12
10 Apr 30/12 Removal 39 Apr 30/12
11 Apr 30/12 40 Apr 30/12
12 BLANK Installation 41 Apr 30/12
List of Figures 13 Apr 30/12 42 Apr 30/12
14 BLANK 43 Apr 30/12
Introduction 15 Apr 30/12 44 Apr 30/12
16 Apr 30/12 45 Apr 30/12
17 Apr 30/12 46 Apr 30/12
18 Apr 30/12 47 Apr 30/12
19 Apr 30/12 48 Apr 30/12
20 Apr 30/12 49 Apr 30/12
21 Apr 30/12 50 Apr 30/12
22 Apr 30/12 51 Apr 30/12
Description and Operation 23 Apr 30/12 52 BLANK
24 Apr 30/12 Illustrated Parts List 53 Apr 30/12
25 Apr 30/12 54 Apr 30/12
26 Apr 30/12 55 Apr 30/12
27 Apr 30/12 56 Apr 30/12
28 Apr 30/12 57 Apr 30/12
29 Apr 30/12 58 Apr 30/12
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2. Model Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
A. ELT/NAV Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B. Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 1. ELT Compatibility List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
A. Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
B. RTCA DO-160C Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 2. Environmental Categories Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4. List of Acronyms, Abbreviations, and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
A. Regulatory Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Other Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DESCRIPTION AND OPERATION
1. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
A. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
B. Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
C. Position Data Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
D. 24-Bit Address Reprogramming Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2. Navigation System Interface Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
A. ARINC 429 Latitude and Longitude Data Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B. RS-232 Latitude and Longitude Data Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
A. Position Data Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
B. 24-Bit Address Reprogramming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
A. Physical and Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 3. Physical and Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
B. Input/Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 4. Input/Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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C. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TEST AND FAULT ISOLATION
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A. Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
B. Regulatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2. Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
A. Inspection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3. Periodic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. Position Data ELT Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4. Post-Installation Functional Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
B. Position Data Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
C. 24-Bit Address Reprogramming Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5. Post-Reprogramming Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
A. 15-Digit Hex ID Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6. Fault Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
A. Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 6. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
REMOVAL
1. ELT/NAV Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
A. Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2. Material or Equipment Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
A. Shipment Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
B. Return Material Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
INSTALLATION
1. Regulatory Requirements and Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A. Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
B. TSO C126, Paragraph D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
C. FAA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
D. Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
E. Other Countries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
F. RTCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2. Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
A. Chassis Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
B. Chassis Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
A. General Considerations and Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
B. ELT and Navigation System Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
C. 24-Bit Address Reprogramming – Hard Wire Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
D. 24-Bit Address Reprogramming – Switch Block Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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ILLUSTRATED PARTS LIST
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
A. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
B. IPL Usage Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2. Manufacturer Name and Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
A. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3. Explanation of Detailed Parts List Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
A. Fig # & Item Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
B. Part # Column. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
C. Nomenclature Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
D. UPA (Units Per Assembly) Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4. Detailed Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
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LIST OF FIGURES
Figure 1. ELT/NAV Interface System Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 2. ELT/NAV Interface Isometric View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 3. Examples of Location Protocol 406 MHz Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 4. 406 MHz Location Message without Position Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 5. ELT/NAV Interface Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 6. ELT/NAV Interface Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 7. ELT/NAV Interface Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 8. ELT/NAV Interface Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 9. Wiring Installation at ELT End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 10. ELT/NAV Interface Wiring Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 11. Octal/Hexadecimal to Binary Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Illustrated Parts List
Figure 12. ELT/NAV Interface Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 13. Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
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TASK 25-69-10-990-801
1. Manual Usage
SUBTASK 25-69-10-990-001
A. General
(1) This manual describes the operation, installation, and maintenance of the ELT/NAV Interface.
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
this manual.
(2) Web links provided in this manual were accurate at time of printing but may be subject to
change.
453-6500
INTRODUCTION
for the latest information and any updates to
(3) 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.
SUBTASK 25-69-10-990-002
B. Application
(1) This manual constitutes supporting data/documentation for the ELT/NAV Interface, including:
(a) Description and Operation
(b) Test and Fault Isolation (includes inspection criteria)
(c) Removal
(d) Installation
(e) Illustrated Parts List
(2) In the United States, the ELT/NAV Interface 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 ELT/NAV Interface must be installed and maintained in accordance with the
requirements herein and Canadian Aviation Regulations (CAR), Part V and other CAR
airworthiness requirements, as applicable.
(4) ELT/NAV Interface installation and maintenance in all other countries must comply with the
requirements herein and applicable national airworthiness requirements.
(5) To ensure proper operation, only parts listed in the Illustrated Parts List of this manual or
those recommended by ACR Electronics, Inc. may be used as replacement parts for the ELT/
NAV Interface.
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ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-69-10-990-802
2. Model Description
SUBTASK 25-69-10-990-001
A. ELT/NAV Interface
(1) The ELT/NAV Interface provides the means to transmit position data received from the aircraft
navigation system to the ELT.
(2) The ELT/NAV Interface is available in two installation configurations:
(a) 24-bit auto reprogramming and position data, or
(b) Position data only.
SUBTASK 25-69-10-990-002
B. Compatibility
453-6500
(1) Table 1 lists the ELTs compatible with the ELT/NAV Interface.
Table 1. ELT Compatibility List
ELT MODEL
NUMBER
110-406 NAV* 453-0421
110-406HM NAV* 453-0422
110-406ED NAV* 453-0424
B406-2* 453-0003
C406-1 453-5002
C406-1HM 453-5003
C406-2 453-5000
C406-2HM 453-5001
B406-4 453-5004
G406-4 453-5012
PART NUMBER
G406-1* 453-5100
G406-2* 453-5102
*Discontinued Product
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
TASK 25-69-10-990-803
3. Approvals
SUBTASK 25-69-10-990-001
A. Certification
(1) FAA TSO C126 System Component
NOTE
: Details of TSO certification for the ELT/NAV Interface are available in the “TSO
Qualification Test Report for the ELT/NAV Interface System” (Document 6288).
(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) JTSO-2C126
453-6500
SUBTASK 25-69-10-990-002
B. RTCA DO-160C Compliance
(1) DO-160C Environmental Categories: C1-204A204204XRXXXXXBABA204BXXX
(2) A breakdown of the DO-160C environmental categories is provided in Table 2.
Table 2. Environmental Categories Breakdown
CATEGORY SECTION DESCRIPTION
C1 4.0 Temperature/Altitude
- 4.5.4 In-Flight Loss of Cooling
204 5.0 Temperature Variation
A6.0 Humidity
204 7.0 Shock
204 8.0 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
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DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
453-6500
CATEGORY SECTION DESCRIPTION
X 15.0 Magnetic Effect
B 16.0 Power Input
A 17.0 Voltage Spike
B 18.0 Audio Frequency Susceptibility
A 19.0 Induced Signal Susceptibility
204 20.0 Radio Frequency Susceptibility
B 21.0 Emission of Radio Frequency Energy
X 22.0 Lightning
X 23.0 Lightning Direct Effects
X 24.0 Icing
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