Garmin GTN 650, GMA 35, GTN 750, GTN 725, GTN 635 Instructions

Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

as installed in

(Make and Model Aircraft)

Reg. No. ___________ S/N __________

Dwg. Number:

190-01007-K8 Rev. 3

Garmin International, Inc.

1200 E. 151st Street

Olathe, Kansas 66062 USA

			Record of Revision
	Rev.	Date	Description of Change
	1	10/17/2013	Initial Release.
	2	3/22/2016	Updated Figures in Section 2.8 and Appendix A, Added instructions to
			disable Airspace Altitude Labels.
	3	01/29/2020	Corrected references and added information about GMA 35c and
			Flight Stream 510.

Company Proprietary Information

This drawing and the specifications contained herein are the property of Garmin International or its subsidiaries and may not be reproduced or used in whole or in part as the basis for manufacture or sale of products without written permission.

Copyright © 2020 Garmin Ltd. or its subsidiaries. All rights reserved.

Garmin International, Inc.

1200 E. 151st Street

Olathe, Kansas 66062 U.S.A.

Page ii	190-01007-K8 Rev. 3
	Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

Table of Contents

1	INTRODUCTION....................................................................................................................			1
	1.1	Purpose..................................................................................................................................		1
	1.2	Scope	.....................................................................................................................................	1
	1.3	Document Control ...................................................................................................................		1
	1.4	Permission to Use Certain Documents ......................................................................................		1
	1.5	Definitions ..............................................................................................................................		1
	1.6	Terminology ...........................................................................................................................		1
2 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS ..........................................................				2
	2.1	Introduction............................................................................................................................		2
	2.2	Description of Alteration ..........................................................................................................		2
	2.3	Control, Operation, and Testing Information .............................................................................		3
	2.4	Servicing Information ..............................................................................................................		3
	2.5	Periodic Maintenance ..............................................................................................................		3
	2.6	Troubleshooting Information....................................................................................................		6
	2.7	Removal and Replacement Information ....................................................................................		6
	2.8	Equipment Location and Access ...............................................................................................		7
	2.8.1 GTN STC Installation Equipment Layout ..........................................................................			7
	2.8.2		GTN Navigator Installation..............................................................................................	8
	2.8.3 Circuit Breaker and GPS Switch Installation....................................................................			11
	2.8.4		Wire Routing ...............................................................................................................	16
	2.8.5		Weight and Balance .....................................................................................................	17
	2.9	Diagrams..............................................................................................................................		17
	2.10	Special Inspection Requirements............................................................................................		18
	2.11	Application of Protective Treatments ......................................................................................		18
	2.12	Data Relative to Structural Fasteners......................................................................................		18
	2.13	Special Tools ........................................................................................................................		18
	2.14	Additional Instructions...........................................................................................................		18
	2.15	Overhaul Period ....................................................................................................................		18
	2.16	ICA Revision and Distribution.................................................................................................		18
	2.17	Assistance ............................................................................................................................		18
	2.18	Implementation and Record Keeping......................................................................................		18
3	AIRWORTHINESS LIMITATIONS SECTION ........................................................................			19
APPENDIX A EQUIPMENT LOCATIONS AND WIRE ROUTING ................................................				20

Table of Tables

Table 1. Maintenance Intervals for GTNs and GMA 35 ...........................................................................	3
Table 2. Maintenance Intervals for Antennas Replaced Under this STC ...................................................	5
Table 3. Bill of Materials for GTN Navigators and Optional GMA Audio Panel ...........................................	8
Table 4. GTN Circuit Breaker Labels ...................................................................................................	11
Table 5. Bill of Materials for Circuit Breaker and GPS Switch ................................................................	11
Table 6. Typical Weight and Balance of GTN and GMA 35 Installation ..................................................	17
Page iii	190-01007-K8 Rev. 3

Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

1 INTRODUCTION

1.1 Purpose

This document provides Instructions for Continued Airworthiness compliant with requirements of 14 CFR §27.1529, and Part 27 Appendix A. This ICA is to be used by the agency installing Garmin GTN 6XX/7XX navigators, GMA 35/35c audio panel, Flight Stream 510, and additional equipment under the STC SR02120SE, and includes information required by the operator to adequately maintain installed items.

1.2 Scope

This document provides the Instructions for Continued Airworthiness for Eurocopter AS350B2/B3 rotorcraft, modified by the installation of the Garmin GTN 6XX/7XX,optional GMA 35/35c, and Flight Stream 510 under the AML STC SR02120SE.

1.3 Document Control

This document shall be released, archived, and controlled in accordance with the Garmin document control system. When this document is revised, refer to Section 2.16 for information on how to gain FAA acceptance or approval and how to notify customers of changes.

1.4 Permission to Use Certain Documents

Permission is granted to any corporation or person applying for approval of a Garmin GTN 6XX/7XX, GMA 35/35c, and Flight Stream 510 to use and reference appropriate STC documents to accomplish the Instructions for Continued Airworthiness and show compliance with STC engineering data. This permission does not construe suitability of the documents. It is the responsibility of the applicant to determine the suitability of the documents for the ICA.

1.5 Definitions

The following terminology is used within this document:

1)ACO: Aircraft Certification Office

2)AEG: Aircraft Evaluation Group

3)BIT: Built-In Test

4)COM: Communications

5)CFR: Code of Federal Regulations

6)FAA: Federal Aviation Administration

7)GPS: Global Positioning System

8)ICA: Instructions for Continued Airworthiness

9)LED: Light Emitting Diode

10)LRU: Line Replaceable Unit

11)NAV: Navigation

12)MFD: Multi-Function Display

13)PMI: Principal Maintenance Inspector

14)POI: Principal Operations Inspector

15)STC: Supplemental Type Certificate

16)TSO: Technical Standard Order

17)WAAS: Wide Area Augmentation System

1.6Terminology

Except where specifically noted, references made to the ‘GTN’ will equally apply to the GTN 625/635/650/725/750. Also, ‘GTN 7XX’ refers specifically to the GTN 725 and GTN 750, and ‘GTN 6XX’ refers specifically to the GTN 625, GTN 635, and GTN 650.

Except where explicitly noted, references made to the GMA 35 will be synonymous with the GMA 35 and GMA 35c.

190-01007-K8 Rev. 3	Page 1 of 20
Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

2 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS

2.1 Introduction

Content, Scope, Purpose and	This document identifies the Instructions for Continued Airworthiness for
Arrangement:	the modification of the aircraft by installation of the Garmin GTN 6XX/7XX
	Part 27 AML STC.
Applicability:	Applies to aircraft altered by installation of the Garmin GTN 6XX/7XX per
	STC SR02120SE.
Definition of Abbreviations:	See Sections 1.5 and Section 1.6
Precautions:	None
Units of measurement:	None
Referenced publications:	1)	Garmin 190-01007-B1 Rev. 1, “GTN 6XX/7XX Part 27 AML STC
		Maintenance Manual” or later revisions
	2)	Garmin 190-01007-03 Rev. D, “GTN 725/750 Pilot’s Guide” or later
		revisions
	3)	Garmin 190-01004-03 Rev. D, “GTN 625/635/650 Pilot’s Guide” or later
		revisions
	4)	Eurocopter, “Standard Practices Manual” (MTC)
	5)	Eurocopter “Master Services Manual” (MSM) Chapter 4
Retention:	This document, or the information contained within, will be included in the
	aircraft’s permanent records.

2.2 Description of Alteration

The GTN navigators are a family of aviation panel mounted retro-fit products. GTN units utilize a touchscreen as the primary control interface. Traditional knobs and buttons have been minimized to simplify access to the color multi-function display (MFD), NAV and COM transceiver, and GPS/WAAS navigator functions.

The GTN 625/635/650 Navigators (Garmin Touch Navigation) are a family of 2.65-inch tall aviation panel mounted retro-fit products that are intended to supersede the Garmin 400W Series Navigators. The GTN 6XX product family consists of the GTN 625 GPS/WAAS navigator, the GTN 635 GPS/WAAS/COM navigator, and the GTN 650 GPS/WAAS/NAV/COM navigator.

The GTN 725/750 Navigators (Garmin Touch Navigation) are a family of 6.00-inch tall aviation panel mounted retro-fit products that are intended to supersede the Garmin 500W Series Navigators. The GTN 7XX product family consists of the GTN 725 GPS/WAAS navigator, and the GTN 750 GPS/WAAS/NAV/COM navigator.

The optional GMA 35 is an audio panel with a Marker Beacon receiver. The GMA 35 in conjunction with a GTN 7XX provide full audio panel capability, for communication and navigation radios, headsets, microphones, and speakers. The GMA 35c provides the functionality of the GMA 35, with the capability to pair Bluetooth™ audio sources. This enables the distribution of audio to ICS positions when using a compatible iOS or Android™ device. The GMA 35c supports up to ten stored devices and one active Bluetooth device. The GMA 35 is mounted in a notch behind the GTN 7XX to free up mounting space in the flight deck instrument panel.

The Flight Stream 510 is a wireless-enabled data card that is inserted into the GTN data card slot to allow wireless database synchronization with personal electronic devices (PEDs). Synchronized information is then disseminated to various LRUs through their existing GTN interface connections.

190-01007-K8 Rev. 3	Page 2 of 20
Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

2.3 Control, Operation, and Testing Information

See Garmin 190-01004-03 Rev. D, “GTN 625/635/650 Pilot’s Guide” and 190-01007-03 Rev. D, “GTN 725/750 Pilot’s Guide” for information on how to operate the system in normal mode.

See the Section 3 of the GTN 6XX/7XX PART 27 AML STC MAINTENANCE MANUAL, Section 3 for details on how to operate and access configuration mode and diagnostic pages, and Section 1.5 for document part numbers. See Section 6 for general ground checks and system test procedures.

See GTN 6XX/7XX PART 27 AML STC MAINTENANCE MANUAL for a system description.

2.4 Servicing Information

None.

In the event of system failure, troubleshoot the GTN 6XX/7XX GMA 35, and Flight Stream 510 in accordance with Section 4 of the GTN 6XX/7XX PART 27 AML STC MAINTENANCE MANUAL.

2.5 Periodic Maintenance

The GTN and GMA 35 are designed to detect internal failures. A thorough self-test is executed automatically upon application of power to the units, and built-in tests (BIT) are continuously executed. Detected errors are indicated as failure annunciations, system messages, or a combination of the two.

Operation of the GTN 6XX/7XX and GMA 35 is not permitted unless the inspections described in this section have been completed within time intervals prescribed in Table 1 or Table 2 if applicable. All antennas connected to the GTN should be maintained in accordance with maintenance and inspection data appropriate for the antenna installation.

Table 1 Maintenance Intervals for GTNs, GMA 35, and Flight Stream 510

	ITEM	DESCRIPTION/PROCEDURE
	INTERVAL
	1. EQUIPMENT REMOVAL &	Removal and replacement of the following items.
	REPLACEMENT	(1)	GTN 6XX/7XX, GMA 35, or Flight Stream 510
	ON CONDITION	(2)	NAV antenna cable splitter
		(3)	NAV antenna cable diplexer
		(4)	Cooling Fan
		See Section 5 of GTN 6XX/7XX PART 27 AML STC MAINTENANCE MANUAL
		for instructions.
	2. DISPLAY BACKLIGHT	The display backlight LEDs are rated by the manufacturer as having a
		usable life of at least 36,000 hours. This life may be more or less than the
	ON CONDITION
		rated time depending on the operating conditions of the GTN. Over time,
		the backlight lamp may dim and the display may not perform as well in
		direct sunlight conditions.
		The user must determine by observation when the display brightness is not
		suitable for its intended use. Contact the Garmin factory repair station when
		the backlight lamp requires service.

190-01007-K8 Rev. 3	Page 3 of 20
Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3

	ITEM	DESCRIPTION/PROCEDURE
	INTERVAL
	3. BATTERY REPLACEMENT	The GTN has an internal keep-alive battery that will last about 10 years. The
		battery is used for GPS system information. Regular planned replacement is
	ON CONDITION
		not necessary.
		The GTN will display a low battery’ message when replacement is required.
		Once the low battery message is displayed, the battery should be replaced
		within 1 to 2 months. If the battery is not replaced and becomes totally
		discharged, the GTN unit will remain fully operational, but the GPS signal
		acquisition time may be increased. There is no loss of function or accuracy
		of the GTN unit with a dead battery.
		The battery must be replaced by the Garmin factory repair station or factory
		authorized repair station.
	4. ELECTRICAL BONDING	Perform an electrical bonding check as follows:
	CHECK, GTN/GMA	1. Remove the GTN and GMA 35 (if installed) from the mounting rack(s)
		2. Remove the backplate assembly from the rack(s).
	BOND CHECK TO BE
	PERFORMED EVERY 10
	YEARS OR 1800 FLIGHT	NOTE For GTN 7XX only, if the GMA 35 is installed, it must be removed
	HOURS, WHICHEVER	from its rack and the GMA 35 backplate assembly must be
	COMES FIRST.	removed prior to performing Step 3. When a GMA 35 bonding
	THE CHECK IS TO BE	check is planned, perform the GMA 35 bonding check prior to
	PERFORMED DURING THE	reinstalling the GTN backplate assembly to the rack.
	AS350 600 FLIGHT
	HOUR /24 MONTH	3. Measure the resistance between each mounting rack and nearby
	INSPECTION	exposed portion of metallic structure and verify that the resistance is
		less than or equal to 10 milliohms.
		In the event of bonding test failure, remove the rack and verify that the
		countersunk areas around the holes, in the rack that are used to attach
		the rack, are free of corrosion or any other debris. Clean the
		countersunk areas using an approved solvent per Eurocopter Standard
		Practices Manual (MTC 20-02-07-401). Reattach the rack to the rails in
		the panel or pedestal. Re-verify the resistance between the mounting
		rack and nearby exposed portion of aircraft metallic structure and
		ensure that the resistance is less than or equal to 2.5 milliohms.
		4. Reinstall all backplate assemblies and reinstall the GTN in the mounting
		rack.
	5. VISUAL INSPECTION	The GTN unit, GMA 35 (if installed), Flight Stream 510 (if installed),
		switches, and wiring harnesses should be inspected to ensure continued
	TO BE PERFORMED IN
		integrity of the installation in alignment with Eurocopter Master Servicing
	ALIGNMENT WITH THE
		Manual (MSM 05-22-00).
	EUROCOPTER AS350
	600 FLIGHT HOUR	Visually inspect the following to ensure continued installation integrity:
	INSPECTION OR EVERY
		1. Inspect the GTN unit(s) and GMA 35 for security of attachment,
	24 MONTHS, WHICHEVER
		including visual inspection of mounting racks and rotorcraft instrument
	COMES FIRST.
		panel or avionics console supporting structure to which the racks attach.
		Verify the countersunk fastener heads are in full contact with unit
		mounting rack holes. If a GTN Navigator is installed in the center
		console, inspect the condition of the console and unit install rack around
	190-01007-K8 Rev. 3	Page 4 of 20

Instructions for Continued Airworthiness GTN 6XX/7XX - Eurocopter AS350B2/B3