Garmin GDL 82 User Manual

190-01810-11 September 2019 Revision 2

Instructions for Continued Airworthiness

& Maintenance Manual,

GDL 82 Mooney M20( ) Series STC

Aircraft make, model, registration number, and serial
number and accompanying STC configuration
information in Appendix A must be completed and
retained with aircraft permanent records.

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

Page i

©2019 Garmin International or its subsidiaries

All Rights Reserved

Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
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written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual
and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and
to print one copy of this manual or of any revision hereto, provided such electronic or printed copy of
this manual or revision must contain the complete text of this copyright notice and provided further any
unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.

Garmin®, flyGarmin®, and GDL® are registered trademarks of Garmin International or its subsidiaries.
The GDL 82™ and GTN™ are trademarks of Garmin International or its subsidiaries. These trademarks
may not be used without the express permission of Garmin.

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All other product or company names that may be mentioned in this publication are trade names,

trademarks, or registered trademarks of their respective owners.
At Garmin, we value your opinion. For comments about this guide please e-mail:

[e-mail].

For information regarding the Aviation Limited Warranty, refer to Garmin’s website.

Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
Aviation Dealer Technical Support Line (Toll Free): [phone]

www.garmin.com
www.flyGarmin.com

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2345 Turner Rd. SE
Salem, OR 97302 USA
Telephone: [phone]

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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RECORD OF REVISIONS

Revision

Revision Date

Description

1

12/14/2017

Initial Release

2

09/23/2019

Update to add GPS 175/GNC 355 as GPS sources, and to update main
board and GPS/GBAS board software versions (non-functional)

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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INFORMATION SUBJECT TO EXPORT CONTROL LAWS

This document may contain information which is subject to the Export Administration Regulations (“EAR”)
issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C) and which may not
be exported, released, or disclosed to foreign nationals inside or outside of the United States without first
obtaining an export license. A violation of the EAR may be subject to a penalty of up to 10 years imprisonment
and a fine of up to $1,000,000 under Section 2410 of the Export Administration Act of 1979. Include this notice
with any reproduced portion of this document.

DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES

WARNING

This product, its packaging, and its components contain chemicals known to the State of California to
cause cancer, birth defects, or reproductive harm. This notice is being provided in accordance with
California's Proposition 65. If you have any questions or would like additional information, please refer
to our web site at www.garmin.com/prop65.

NOTE

All screen shots used in this document are current at the time of publication. Screen shots are intended to
provide visual reference only. All information depicted in screen shots, including software file names,
versions, and part numbers, is subject to change and may not be up to date.

WARNING

Warnings indicates that personal injury or death is possible if the instructions are not
obeyed.

CAUTION

Cautions are used to alert that damage to equipment may result if the procedural step is
not followed.

NOTE

Notes provide further information about preceding steps and/or reasons for the

particular operation.

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

Page iv

TABLE OF CONTENTS

SECTION ........................................................................................................................................... PAGE

1 INTRODUCTION ................................................................................................................................... 1

1.1 Introduction ...................................................................................................................................... 1

1.2 Organization ..................................................................................................................................... 1

1.3 Acronyms and Abbreviations .......................................................................................................... 1

1.4 Publications ...................................................................................................................................... 2

1.5 Revision and Distribution ................................................................................................................ 2

2 SYSTEM DESCRIPTION ....................................................................................................................... 3

3 CONTROL & OPERATION ................................................................................................................... 4

3.1 GDL 82 Install Tool ......................................................................................................................... 4

4 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS .................................................................. 8

4.1 Airworthiness Limitations ............................................................................................................... 8

4.2 Servicing Information ...................................................................................................................... 8

4.3 Maintenance Intervals ...................................................................................................................... 9

4.4 Visual Inspection ........................................................................................................................... 10

4.5 Electrical Bonding Test.................................................................................................................. 11

5 TROUBLESHOOTING ........................................................................................................................ 12

5.1 General ........................................................................................................................................... 12

5.2 ADS-B OUT FAIL Annunciator ................................................................................................... 14

5.3 GDL 82 Install Tool ....................................................................................................................... 14

5.4 GDL 82 Data Logging ................................................................................................................... 16

5.5 GDL 82 Connector Pinout ............................................................................................................. 17

6 EQUIPMENT REMOVAL & INSTALLATION ................................................................................. 18

6.1 GDL 82 Unit .................................................................................................................................. 18

6.2 Annunciator and Switch ................................................................................................................. 18

6.3 GPS Antenna .................................................................................................................................. 19

6.4 Transponder Antenna ..................................................................................................................... 19

7 EQUIPMENT CONFIGURATION & CHECKOUT ............................................................................ 20

7.1 System Checkout ........................................................................................................................... 20

7.2 GDL 82 Configuration ................................................................................................................... 20

7.3 GDL 82 Post-Installation Test Procedures..................................................................................... 21

8 RETURN TO SERVICE PROCEDURE ............................................................................................... 21

8.1 Maintenance Records ..................................................................................................................... 21

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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FIGURES

FIGURE PAGE

Figure 2-1: GDL 82 System I/O Interfaces ...................................................................................... 3

Figure 3-1: USB A and USB B Connectors ..................................................................................... 4

Figure 3-2: GDL 8X Install Tool Selection ..................................................................................... 4

Figure 3-3: GDL 82 Unit Information Page ..................................................................................... 5

Figure 3-4: GDL 82 Software Upload Page ..................................................................................... 6

Figure 3-5: GDL 82 System Configuration Page ............................................................................. 7

Figure 5-1: GDL 82 Install Tool, Faults Page ............................................................................... 15

Figure 5-2: GDL 82 Install Tool, GPS Page .................................................................................. 15

Figure 5-3: GDL 82 Install Tool, GPS Sat Status Page ................................................................. 16

Figure 5-4: GDL 82 Install Tool, Assert Log Page ........................................................................ 16

Figure 5-5: Rear View, Connector J821 ........................................................................................ 17

TABLES

TABLE PAGE

Table 1-1: Recommended Documents ............................................................................................ 2

Table 4-1: Maintenance Intervals .................................................................................................... 9

Table 5-1: General Troubleshooting Guide ................................................................................... 12

Table 5-2: System Faults Troubleshooting Guide ......................................................................... 13

Table 5-3: J821 Pinout ................................................................................................................... 17

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

Page 1

1 INTRODUCTION

1.1 Introduction

This document provides Instructions for Continued Airworthiness (ICA) and Maintenance Manual
(MM) for the Garmin GDL 82 UAT Transmitter as installed in Mooney M20() Series aircraft under STC
SA02573SE. This document satisfies the requirements for continued airworthiness as defined by 14
CFR Part 23.1529 and Appendix G. Information in this document is required to maintain the continued
airworthiness of the GDL 82.

1.2 Organization

The following outline briefly describes the organization of this manual:

Section 2: System Description

Provides a complete description of the type design change associated with installing the GDL 82. An
overview of the system interface is also provided.

Section 3: Control & Operation
Presents basic control and operation information related to maintenance of the GDL 82.

Section 4: Instructions for Continued Airworthiness
Provides maintenance instructions for continued airworthiness of the GDL 82.

Section 5: Troubleshooting
Provides troubleshooting information to aid in diagnosing and resolving potential problems with the
GDL 82.

Section 6: Equipment Removal & Installation
Contains instructions for the removal and installation of the GDL 82.

Section 7: Equipment Configuration & Checkout
Contains instructions for configuring and testing the GDL 82 after reinstallation or replacement.

Section 8: Return to Service Procedure
Specifies return-to-service procedures required after completion of the GDL 82 maintenance.

Appendix A: Installation Specific Information
Provides a template to record general installation information and the system configuration log for a
specific installation of the GDL 82.

1.3 Acronyms and Abbreviations

The following acronyms are used in this manual:

AC

Advisory Circular

ICA

Instructions for Continued Airworthiness

ADS-B

Automatic Dependent Surveillance –
Broadcast

ICAO

International Civil Aviation Organization

AFM

Airplane Flight Manual

I/O

Input / Output

AFMS

Airplane Flight Manual Supplement

IM

Installation Manual

ALT

Altitude

MM

Maintenance Manual

ATC

Air Traffic Control

PC

Personal Computer

CFR

Code of Federal Regulations

POH

Pilot Operating Handbook

DC

Direct Current

SBAS

Satellite-Based Augmentation System

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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ELA

Electrical Load Analysis

STC

Supplemental Type Certificate

EMC

Electromagnetic Checkout

SW

Software

FAA

Federal Aviation Administration

UAT

Universal Access Transceiver

GDL

Garmin Datalink Transceiver

USB

Universal Serial Bus

GNS

Garmin Navigator Series

Vs0

Aircraft Stall Speed (in landing
configuration)

GPS

Global Positioning System

XPDR

Transponder

GTN

Garmin Touch Navigator

1.4 Publications

When performing GDL 82 system maintenance it is recommended the following documents are available.

Table 1-1: Recommended Documents

Part Number

Garmin Document

190-01810-03

GDL 82 Pilot's Quick Start Guide

190-01810-10

GDL 82 Mooney M20() Series STC Installation Manual

190-01810-12

Airplane Flight Manual Supplement for the GDL 82 Mooney M20 Series

1.5 Revision and Distribution

This document is required for maintaining the continued airworthiness of the aircraft. When this
document is revised, every page will be revised to indicate current revision level.

Owner/operators may obtain the latest revision of this document at www.flyGarmin.com or by contacting
a Garmin dealer. Garmin contact information is available at www.flyGarmin.com.

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

Page 3

2 SYSTEM DESCRIPTION

The GDL 82 is a remote-mounted unit that contains 978 MHz and 1030 MHz transmitters, and a 1090
MHz receiver. It is installed in-line with the existing transponder and L-Band antenna. The GDL 82
transmits ownship ADS-B Out data via the UAT data link using the existing transponder’s L-Band
antenna. The GDL 82 utilizes the direct in-line connection to synchronize with the aircraft transponder via
1030 MHz interrogations to obtain the transponder Squawk (Mode 3/A) code, IDENT status and pressure
altitude.

ADS-B equipment requires GPS/SBAS data for ADS-B Out transmissions. Only the GPS/SBAS data
sources specified in the GDL 82 Mooney M20() Series STC Installation Manual, 190-01810-10, are
approved by this STC to interface with the GDL 82.

The GDL 82 uses the following interfaces:

• Aircraft Power and Ground

• Transponder Coaxial Connection

• L-Band Coaxial Connection

• GPS Coaxial Connection – Used only for internal GPS source

• 1 RS-232 I/O – Used only for external GPS source

• 1 Discrete Output – Failure Annunciator (optional)

• 2 Discrete Inputs – Anonymous Mode Switch and Squat Switch (optional)

• USB Interface – Configuring GDL 82 and Loading Software from PC

The GDL 82 System Interface Diagram is shown in Figure 2-1.

Figure 2-1: GDL 82 System I/O Interfaces

GPS Antenna

GPS Source

Bottom L-Band Antenna

(GDL 82 with GPS only)

OR

Discrete

Failure

Annunciator

Power/Ground

Transponder

RS-232

USB

PC Config

Tool

Coax

Coax

OPTIONAL

Discrete

Anonymous

Mode Switch

Discrete

Squat/WOW

Switch

GDL 82

GPS Time Mark

Coax

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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3 CONTROL & OPERATION

The GDL 82 user control interface is limited to ADS-B OUT FAIL annunciator and the UAT
ANONYMOUS mode switch, installation of either or both is optional. The primary ADS-B Out UAT
transmit function of the GDL 82 does not require direct user input.

Refer to the GDL 82 Pilot’s Quick Start Guide, 190-01810-03, and the Airplane Flight Manual
Supplement for the GDL 82 Mooney M20 Series, 190-01810-12, for control and operation information.

3.1 GDL 82 Install Tool

The GDL 8X Install Tool (Garmin Part Number: 006-A0248-20) allows for configuration, diagnostics,
and software loading. The tool is available for download from the Garmin Dealer Resource Center and

flyGarmin.com. The GDL 8X Install Tool requires a computer with Microsoft Windows XP or later and

an available USB 2.0 port.
A USB A-to-B cable is required to interface between a computer and the GDL 82, refer to Figure 3-1 for

details.

Figure 3-1: USB A and USB B Connectors

The GDL 82 Install Tool provides access to the following functions -

• Diagnostics – reports device information, faults, interface status and other information for post

installation checkout procedures. It also allows the unit assert log to be saved and cleared.

• Configuration – allows selection of installation options.

• System Update – allows upload of software to the GDL 82 unit.

To utilize the GDL 82 Install Tool, first disconnect power from the GDL 82, and then connect the USB
cable. Restore power to the GDL 82, and then run the GDL 8X Install Tool.

The GDL 8X Install Tool will automatically detect which unit it is interfaced with (e.g., GDL 82 or GDL
84/88). To use the GDL 82 Install Tool verify that the GDL 82 unit is checked Present and select the

GDL 82 button. See Figure 3-2.

Figure 3-2: GDL 8X Install Tool Selection

ICA/MM, GDL 82 Mooney M20( ) Series STC 190-01810-11
Rev. 2

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NOTE

When the GDL 82 unit is connected to the PC (via USB) and the GDL 8X Install Tool is active,
the GDL 82 will automatically be placed in Configuration Mode. To reset the GDL 82 into
Normal Mode, power down the unit, disconnect it from the USB and reapply power to the GDL

82.

3.1.1 Device Information

The Unit Information page, displays product information such as the model, part number, serial numbers,
software version and software part numbers to be viewed.

Figure 3-3: GDL 82 Unit Information Page

The other Diagnostics pages are used during post-installation checkout and troubleshooting. See Section

5.3 for details.