Garmin G1000 NXi Owner's manual

190-02128-04 2017 Revision 3
Supplemental Maintenance
Manual
Textron Aviation Inc.
NAV III Aircraft
Includes Instructions for Continued Airworthiness
for STC SA01830WI

G1000 System Maintenance Manual Page i
Textron Nav III Series Revision 3
190-02128-04
© Copyright 2017
Garmin Ltd. or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
disseminated, downloaded or stored in any storage medium, for any purpose without the express prior
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 that such electronic or printed copy of
this manual or revision must contain the complete text of this copyright notice and provided further that
any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
www.garmin.com
Garmin (Europe) Ltd.
Liberty House, Bulls Copse Road
Hounsdown Business Park
Southampton, SO40 9RB, UK
Phone: [phone]
Fax: [phone]
Garmin AT, Inc.
2345 Turner Rd., SE
Salem, OR 97302 USA
Telephone: [phone]
RECORD OF REVISIONS
Revision
Date
Description
1
12/16/2016
Initial Release
2
02/02/2017
Updated Loader Card Creation Instructions
(Section 3.2.2) and Traffic System Test
Procedures (Section 7.13 and 8.8)
3
07/28/2017
Added pitot static drain check (Section 7.7.3)
DOCUMENT PAGINATION
Section
Pagination
Table of Contents
i –vii
Section 1
1-1 –1-5
Section 2
2-1 –2-7
Section 3
3-1 –3-40
Section 4
4-1–4-8
Section 5
5-1 –5-31
Section 6
6-1 –6-6
Section 7
7-1–7-49
Section 8
8-1 –8-6
Section 9
9-1 - 9-10
Appendix A
A-1

G1000 System Maintenance Manual Page ii
Textron Nav III Series Revision 3
190-02128-04
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 the United States without first obtaining an export license. The preceding
statement is required to be included on any and all reproductions in whole or in part of this
manual.
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.
The GDU lens is coated with a special anti-reflective coating that is very sensitive to skin oils,
waxes and abrasive cleaners. CLEANERS CONTAINING AMMONIA WILL HARM THE ANTI-
REFLECTIVE COATING. It is very important to clean the lens using a clean, lint-free cloth and
an eyeglass lens cleaner that is specified as safe for anti-reflective coatings.
All G1000 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.
CAUTION
WARNING
IMPORTANT

G1000 Supplemental Maintenance Manual Page iii
Textron Nav III Series Revision 3
190-02128-04
TABLE OF CONTENTS
PARAGRAPH PAGE
1. INTRODUCTION.................................................................................................................1-1
1.1 Content, Scope, Purpose..............................................................................................1-1
1.2 Organization..................................................................................................................1-2
1.3 Definitions/Abbreviations ..............................................................................................1-3
1.4 Units of Measure...........................................................................................................1-4
1.5 Publications...................................................................................................................1-4
1.6 Revision and Distribution..............................................................................................1-5
2. SYSTEM DESCRIPTION....................................................................................................2-1
2.1 Equipment Descriptions................................................................................................2-1
2.2 G1000 Optional Interfaces............................................................................................2-5
2.3 Electrical Power Distribution.........................................................................................2-5
2.4 Pitot/Static System........................................................................................................2-5
2.5 GDU 1054B and GDU 1050 Displays...........................................................................2-5
2.6 Softkeys........................................................................................................................2-5
2.7 FMS Knob.....................................................................................................................2-5
2.8 G1000 Normal Mode.....................................................................................................2-6
2.9 Reversionary Mode.......................................................................................................2-7
3. SOFTWARE AND CONFIGURATION................................................................................3-1
3.1 Configuration Mode Overview.......................................................................................3-1
3.2 G1000 System Software Information............................................................................3-6
3.3 Configuration Mode.....................................................................................................3-14
3.4 G1000 Hardware/Software Compatibility Check.........................................................3-14
3.5 Equipment Verification (Third Party/Optional Equipment Documentation) .................3-14
3.6 G1000 Software/Configuration Procedure..................................................................3-16
3.7 System Software and Configuration Load ..................................................................3-17
3.8 Feature Enablement ...................................................................................................3-31
3.9 Aircraft Registration Number Entry.............................................................................3-34
3.10 Configuration Manager ...............................................................................................3-35
3.11 Splash Screen Loading...............................................................................................3-36
3.12 Database Loading.......................................................................................................3-36
3.13 Configuration of Navigation Map for Traffic System ...................................................3-38
3.14 Clearing Default User Settings....................................................................................3-38
3.15 Interface Confirmation.................................................................................................3-39
4. INSTRUCTIONS FOR CONTINUED AIRWORTHINESS...................................................4-1

G1000 Supplemental Maintenance Manual Page iv
Textron Nav III Series Revision 3
190-02128-04
4.1 Airworthiness Limitations..............................................................................................4-1
4.2 Servicing Information....................................................................................................4-2
4.3 Maintenance Intervals...................................................................................................4-4
4.4 Electrical Bonding Test.................................................................................................4-5
4.5 GSU 75 Earth Magnetic Field Updates.........................................................................4-6
4.6 G1000 Redundant Connection Check..........................................................................4-6
5. TROUBLESHOOTING........................................................................................................5-1
5.1 System Annunciations ..................................................................................................5-2
5.2 G1000 Alerting System...............................................................................................5-12
5.3 Synthetic Vision and Pathways Troubleshooting........................................................5-13
5.4 Backup Communications Path Checks.......................................................................5-14
5.5 GDU 105X Troubleshooting........................................................................................5-15
5.6 GDU 105X Alerts ........................................................................................................5-17
5.7 GTX Troubleshooting..................................................................................................5-21
5.8GDL69A SXM Troubleshooting (if installed)...............................................................5-22
5.9 GSU 75 and GMU 44 Troubleshooting.......................................................................5-23
5.10 GSU 75 Troubleshooting ............................................................................................5-27
5.11 Software/Configuration Troubleshooting.....................................................................5-28
5.12 Backshell/Backplate Connectors ................................................................................5-30
6. EQUIPMENT REMOVAL & INSTALLATION.....................................................................6-1
6.1 GDU 1054B/1050..........................................................................................................6-2
6.2 GTX 335R/GTRX 345R Transponder (if installed)........................................................6-2
6.3 GSU 75 ADAHRS (if installed)......................................................................................6-2
6.4 GDL 69A SXM (if installed)...........................................................................................6-3
6.5 Configuration Modules..................................................................................................6-3
7. GARMIN G1000 LRU REPLACEMENT/CONFIGURATION & TESTING..........................7-1
7.1 GDU 1054B/1050 PFD & MFD.....................................................................................7-1
7.2 GMA 1347 Audio Panel ................................................................................................7-4
7.3 GIA 63W Integrated Avionics Unit ................................................................................7-8
7.4 GEA 71 Engine/Airframe Unit.....................................................................................7-17
7.5 GTX 335R, GTX 345R, or GTX 33 Transponder........................................................7-21
7.6 GSU 75 ADAHRS (if installed)....................................................................................7-24
7.7 GDC 74A Air Data.......................................................................................................7-26
7.8 GRS 77 and GMU 44 Magnetometer (if installed)......................................................7-30
7.9 GMU 44 Magnetometer ..............................................................................................7-32
7.10 GSU/GRS/GMU Calibration Procedures ....................................................................7-33

G1000 Supplemental Maintenance Manual Page v
Textron Nav III Series Revision 3
190-02128-04
7.11 GDL 69A or GDL 69A SXM Data Link (if installed).....................................................7-42
7.12 GSA 81 Servos (if installed)........................................................................................7-44
7.13 Garmin Traffic Systems (GTS 800) (if installed).........................................................7-46
8. SUBSYSTEM FUNCTIONAL CHECKS..............................................................................8-1
8.1 Stormscope Functional Check (if installed)...................................................................8-1
8.2 TAWS Functional Check...............................................................................................8-1
8.3 FliteCharts Functional Check........................................................................................8-1
8.4 ChartView Functional Check.........................................................................................8-2
8.5 SafeTaxi Functional Check...........................................................................................8-3
8.6 DME Functional Check.................................................................................................8-4
8.7 ADF Functional Check..................................................................................................8-4
8.8GTS Traffic System Functional Check..........................................................................8-4
8.9 Search and Rescue Functional Check (if installed) ......................................................8-6
9. G1000 SYSTEM RETURN TO SERVICE PROCEDURE ...................................................9-1
9.1 Display Test..................................................................................................................9-1
9.2 Display Failure Test......................................................................................................9-4
9.3 Reversion Mode Check.................................................................................................9-5
9.4GPS Signal Acquisition.................................................................................................9-6
9.5 GPS Failure Test ..........................................................................................................9-7
9.6 GIA Failure Test............................................................................................................9-8
9.7 GEA Functional Check..................................................................................................9-9
9.8G1000 Backup Path Test............................................................................................9-10
9.9 Maintenance Records.................................................................................................9-10

G1000 Supplemental Maintenance Manual Page vi
Textron Nav III Series Revision 3
190-02128-04
LIST OF ILLUSTRATIONS
FIGURE PAGE
Figure 2-1 Flight Stream 510 ....................................................................................................2-1
Figure 2-2, Transponder ............................................................................................................2-2
Figure 2-3 GSU-75 ADAHRS with Connector and Mounting Tray............................................2-3
Figure 2-4, GDL 69A SXM Datalink...........................................................................................2-4
Figure 2-5, G1000 Softkeys.......................................................................................................2-5
Figure 2-6, Normal Mode...........................................................................................................2-6
Figure 2-7, Automatic Reversion with MFD failure ...................................................................2-7
Figure 3-1, SET>ACTV Diagram ...............................................................................................3-2
Figure 3-2, Loss of Communication...........................................................................................3-3
Figure 3-3, Configuration Status................................................................................................3-3
Figure 3-4, Data Transmission Indicators..................................................................................3-3
Figure 3-5, GSU Configuration Settings Storage.....................................................................3-13
Figure 3-6, Garmin Unit S/N Location......................................................................................3-15
Figure 3-7, Software/Configuration Overview..........................................................................3-16
Figure 3-8 –Airframe Group Selection ....................................................................................3-18
Figure 3-9 –Airframe Change Confirmation............................................................................3-19
Figure 3-10, MFD Aux - Database Page DB Transfer .............................................................3-37
Figure 3-11, Stormscope Configuration Page..........................................................................3-39
Figure 3-12, Stormscope Configuration...................................................................................3-39
Figure 5-1, Aux –System Status Page......................................................................................5-1
Figure 5-2, System Annunciations.............................................................................................5-2
Figure 5-3, Alerts & Annunciations ..........................................................................................5-12
Figure 5-4, Alerts Softkey Annunciation...................................................................................5-12
Figure 5-5, Magnetometer Interference Test ...........................................................................5-25
Figure 5-6, GTX 335R/345R Looking at Front of Connector (P3251)......................................5-30
Figure 5-7, GTX 345R (Only) Looking at Front of Connector (P3252).....................................5-30
Figure 5-8, GDU 1054B/1050 Backshell Connector (P10401) ................................................5-31
Figure 5-9, GSU 75 Connector View from Front (P751)..........................................................5-31
Figure 5-10, GDL 69A SXM Backplate Connector (P69A1) ....................................................5-31
Figure 6-1, Configuration Module Installation ............................................................................6-4
Figure 6-2, GSU 75 Configuration Module Installation ..............................................................6-5
Figure 7-1, G1000 Normal Mode Check...................................................................................7-3
Figure 7-2, Aux –GPS Status Page (MFD).............................................................................7-14
Figure 7-3, Normal Engine Instrument Markings (MFD).........................................................7-20
Figure 7-4, Aircraft Registration...............................................................................................7-23
Figure 7-5, GRS/GMU Calibration, Pitch/Roll Offset ...............................................................7-35
Figure 7-6, GRS/GMU Calibration, Engine Run-Up.................................................................7-39
Figure 7-7, Normal Mode AHRS Check..................................................................................7-41
Figure 8-1, Traffic Map...............................................................................................................8-4
Figure 9-1, MFD Power Up Page...............................................................................................9-1
Figure 9-2, PFD Power-up System Annunciations ....................................................................9-2
Figure 9-3, PFD Normal Operation............................................................................................9-3
Figure 9-4, GDU Reversionary Mode ........................................................................................9-5
Figure 9-5, AUX-GPS Status Page............................................................................................9-6

G1000 Supplemental Maintenance Manual Page vii
Textron Nav III Series Revision 3
190-02128-04
LIST OF TABLES
TABLE..................................................................................................................................PAGE
Table 1-1, Required Documents................................................................................................1-4
Table 1-2, Reference Publications............................................................................................1-5
Table 3-1, Garmin Unit S/N Prefixes........................................................................................3-15
Table 4-1, Maintenance Intervals...............................................................................................4-4
Table 5-1, SVS Troubleshooting..............................................................................................5-13
Table 5-2, SVS-Related Alert Messages ................................................................................5-14
Table 5-3, Magnetometer Interference Test Sequence...........................................................5-26
Table 6-1, Configuration Module Kit –011-00979-00...............................................................6-4
Table 6-2, GSU 75 Configuration Module Kit –011-00979-20 ..................................................6-5
Table 7-1, Altitude Test Points.................................................................................................7-28
Table 7-2, Airspeed Test Points...............................................................................................7-29
Table 7-3, Vertical Speed Table ..............................................................................................7-29
Table 7-4, Required GRS/GMU Calibrations...........................................................................7-34

G1000 Supplemental Maintenance Manual Page 1-1
Textron Nav III Series Revision 3
190-02128-04
1. INTRODUCTION
1.1 Content, Scope, Purpose
This document provides Instructions for Continued Airworthiness (ICA) for the NXi configuration
of the Garmin G1000 Integrated Flight Deck including the GFC700 Automatic Flight Control
System (AFCS) as installed in the Textron Aviation Inc., NAV III series of aircraft, under STC
SA01830WI. This document satisfies the requirements for continued airworthiness as defined
by 14 CFR Part 23.1529 and 14 CFR Part 23 Appendix G. Information in this document is
required to maintain the continued airworthiness of the G1000 and GFC700.
Throughout this document, the GFC 700 autopilot system is included in the G1000NXi system
description and is identified separately only when needed.
References to “NAV III” throughout this document include 172R, 172S, 182T, T182T, 206H, and
T206H models. Items in this document that are aircraft model(s) specific will identify the
model(s) instead of “NAV III”.
This document is a supplement to the existing G1000 Nav III Line Maintenance Manual, Garmin
part number 190-00352-00. Except where noted, refer to the G1000 Nav III Line Maintenance
Manual for servicing instructions.
Applicability
This document applies to all Textron Aviation Inc. NAV III aircraft equipped with the G1000NXi
system. All G1000NXi NAV III airplanes are configured per General Arrangement drawing 005-
00620-22 Rev 1 or subsequent.
Modification of an aircraft by this Supplemental Type Certificate (STC) obligates the aircraft
operator to include the maintenance information provided by this document in the operator’s
Aircraft Maintenance Manual.
Identifying an STC Configuration
The General Arrangement drawing lists the G1000 System Software Version numbers approved
for this STC.
IMPORTANT!
If the technician is unsure of an aircraft’s STC configuration, perform the following:
After acknowledgement of the splash screen, use the FMS knob to go to the Aux –System
Status page on the MFD. In the AIRFRAME section (upper right corner,) the display shows the
current G1000NXi airframe configuration and system software version number. The airframe
configuration is shown in the Airframe field and the system software version number is shown in
the following format: ‘SYS SOFTWARE VERSION XXXX.XX’. It correlates to the software
image used to load the software to the system:
EXAMPLE:
System Software Version ’2501.00’ = Software Image P/N 006-B2501-00

G1000 Supplemental Maintenance Manual Page 1-2
Textron Nav III Series Revision 3
190-02128-04
1.2 Organization
The following outline briefly describes the organization of this manual:
Section 2: System Description
Provides a description of the type design change associated with installing the G1000 update
in the Cessna Nav III Series.
Section 3: Software and Configuration
Provides software and configuration loading instructions for a complete system software load.
Section 4: Instructions for Continued Airworthiness
Provides maintenance instructions for continued airworthiness of the G1000 system.
Section 5: Troubleshooting
Provides troubleshooting information to aid in diagnosing and resolving potential problems with
the G1000 system.
Section 6: Equipment Removal & Replacement
Gives instructions for the removal and replacement of G1000 equipment.
Section 7: Garmin G1000 LRU Replacement/Configuration & Testing
Gives instructions for loading software, configuring, and testing of G1000 equipment.
Section 8: Subsystem Functional Checks
Gives instructions for testing G1000 subsystems.
Section 9: G1000 System Return to Service Procedure
Specifies return-to-service procedures to be performed upon completion of maintenance of the
G1000 system.

G1000 Supplemental Maintenance Manual Page 1-3
Textron Nav III Series Revision 3
190-02128-04
1.3 Definitions/Abbreviations
ADAHRS: Air Data and Attitude Heading Reference System
ADC: Air Data Computer
ADF: Automatic Direction Finder
ADS-B: Automatic Dependent Surveillance –Broadcast
ADTS: Air Data Test Set
AFCS: Automatic Flight Control System
AFM: Airplane Flight Manual
AFMS: Airplane Flight Manual Supplement
AHRS: Attitude Heading Reference System
AML: Approved Model List
CDU: Control Display Unit
CFR: Code of Federal Regulations
DME: Distance Measuring Equipment
EIS: Engine Indication System
FIS-B: Flight Information Services –Broadcast
FS: Flight StreamTM
GPS: Global Positioning System
HSDB: High-Speed Data Bus (Ethernet)
ICS: Inter-Com System
LRU: Line Replaceable Unit
MFD: Multi-Function Display
MMC: Multi-Media Card
OAT: Outside Air Temperature
PFD: Primary Flight Display
STC: Supplemental Type Certificate
TAWS: Terrain Awareness & Warning System
TIS-B: Traffic Information Services –Broadcast
VHF: Very High Frequency

G1000 Supplemental Maintenance Manual Page 1-4
Textron Nav III Series Revision 3
190-02128-04
1.4 Units of Measure
Unless otherwise stated, all units of measure are English units.
1.5 Publications
The following documents are required by this maintenance manual to perform maintenance. It
is the responsibility of the owner / operator to ensure latest versions of these documents are
used during operation, servicing or maintenance of the airplane.
Table 1-1, Required Documents
Part Number
Garmin Document
005-00620-21
Master Drawing List, G1000 Avionics Updates, Part 23 AML STC
005-00620-22
General Arrangement, G1000 Textron NAV III
005-00620-24
Forward Avionics Install, G1000 Update 172R/172S
005-00620-25
Forward Avionics Install, G1000 Update, 182T/T182T
005-00620-26
Forward Avionics Install G1000 Update, 206H/T206H
005-00620-27
Remote Avionics Install, G1000 Update, 172R/172S
005-00620-28
Remote Avionics Install, G1000 Update, 182T/T182T
005-00620-29
Remote Avionics Install, G1000 Update, 206H/T206H
005-00620-30
GSU 75 Tray Assembly, Textron Model 182T/T182T
005-00620-31
Wiring Diagram, GDU 105X PFD/MFD, Textron Models 172, 182, 206
005-00620-32
Wiring Diagram, GSU 75 ADAHRS, Textron Models 172, 182, 206
005-00620-33
Wiring Diagram, GTX3X5 Transponder, Textron Models 172, 182, 206
005-00620-34
Wire Harness Install/Routing, Textron Model 172R/172S
005-00620-35
Wire Harness Install/Routing, Textron Model 182T/T182T
005-00620-36
Wire Harness Install/Routing, Textron Model 206H/T206H
005-00620-38
Pitot/Static Plumbing Mod, Textron Model 182T/T182T
005-00620-39
Pitot/Static Plumbing Mod, Textron Model 206H/T206H
005-00620-40
GSU 75 Shelf Assembly, Textron Model 172R/172S
005-00620-58
GSU 75 Shelf Assembly, Textron Model 206H/T206H
Part Number
Textron Aviation Documents
C172RMM
Model 172R/172S Maintenance Manual
C182SMM
Model 182S/182T/T182T Maintenance Manual
C206HMM
Model 206H/T206H Maintenance Manual
SESR
Single Engine Structural Repair Manual –172, 182, 206 Series

G1000 Supplemental Maintenance Manual Page 1-5
Textron Nav III Series Revision 3
190-02128-04
The following publications are recommended to be on hand during the performance of
maintenance activities.
Table 1-2, Reference Publications
Part Number
Garmin Document
190-02128-02
Airplane Flight Manual Supplement, G1000 NXi Integrated Avionics System and GFC 700
AFCS In Textron NAV III Series of aircraft
190-02178-00
G1000 Cockpit Reference Guide for Cessna NAV III
190-00355-04
GDL 69 Series SiriusXM Satellite Radio Activation Instructions
190-00352-00
G1000 NAV III Line Maintenance Manual
Generic installation manuals for individual Garmin LRUs are also available through the ‘Dealer
Resource Center’ section of the Garmin web site; refer to Section 1.6 for details.
1.6 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.
Garmin Dealers may obtain the latest revision of this document on the Garmin Dealer Resource
Center website.
Owner/operators may obtain the latest revision of this document from the https://fly.garmin.com/
Support page, or by contacting a Garmin dealer, contacting Garmin Product Support at 913-
397-8200, toll free 866-739-5687, or using around the world contact information on
https://fly.garmin.com/.
A Garmin Service Bulletin describing the revision to this document will be sent to Garmin
dealers if the revision is determined to be significant.

G1000 Supplemental Maintenance Manual Page 2-1
Textron Nav III Series Revision 3
190-02128-04
2. SYSTEM DESCRIPTION
2.1 Equipment Descriptions
For description of equipment and functions not listed here, refer to the G1000 Nav III Line
Maintenance Manual, Garmin part number 190-00352-00.
GDU 1054B OR GDU 1050 PFD & MFD
Two Garmin GDU 1054B or GDU 1050 displays are installed in the Nav III instrument panel.
The GDU 1054B displays are standard equipment on all Nav III models, while the GDU 1050
displays are installed on Model 172 aircraft that are not equipped with the Garmin GFC700
autopilot.
The GDU 1054B or GDU 1050 displays are 10.4 inch LCD displays with 1024 x 768 resolution.
The GDU 1054B or GDU 1050 units communicate with each other and the GIA 63W units
through a high-speed data bus (HSDB) Ethernet connection.
The PFD receives primary electrical power from the Essential Bus and secondary electrical
power from Avionics Bus No. 1. The MFD receives electrical power from Avionics Bus No. 2.
The displays will power-up immediately with external or aircraft power or battery operation.
All displays are installed in the panel using ¼-turn fasteners.
Flight Stream 510
The Flight Stream™ 510 (FS 510) is a Wi-Fi/Bluetooth capable multi-media card (MMC)
installed the bottom SD slot of the MFD. It sends position, velocity, time, attitude, heading, FIS-
B, TIS-B traffic, Sirius XM audio control, Sirius XM weather data, and flight plan transfer to
mobile devices via Bluetooth. The FS 510 can also interface with a mobile device via Wi-Fi
pairing for the purposes of updating databases used by the GDU(s). Bluetooth and Wi-Fi are
mutually exclusive with only one interface functional at a time. Connecting via Wi-Fi requires a
pilot-configurable Wi-Fi Protected Access WPA2 security password. By updating databases
wirelessly, new databases may be transferred to the G1000 system without taking the data card
out of the aircraft.
Figure 2-1 Flight Stream 510

G1000 Supplemental Maintenance Manual Page 2-2
Textron Nav III Series Revision 3
190-02128-04
Transponder
The Garmin GTX 33, GTX 345R, or GTX 335R transponders communicate with the GIA 63Ws
through RS-232 digital interface.
The GTX 345R also communicates with the G1000 Avionics through an HSDB interface
connected to the PFD. When installed, the GTX 345R communicates and controls the GTS
Processor through the HSDB interface for all TAS operations. The GTX 345R mixes and
coordinates the TAS targets with TIS-B targets to provide one coordinated traffic display to the
crew.
The transponder units are mounted in the tail section of the aircraft.
Power is provided to the GTX from the Avionics Bus #2. The GTX transponder interfaces with a
transponder antenna mounted to the bottom of the fuselage.
GTX 345R/GTX 335R
Figure 2-2, Transponder

G1000 Supplemental Maintenance Manual Page 2-3
Textron Nav III Series Revision 3
190-02128-04
GSU 75 ADAHRS
The GSU 75 ADAHRS is a combined Air Data and AHRS system. The unit is mounted in the
tail avionics area. It contains advanced tilt sensors, accelerometers, rate sensors, static
pressure sensors, and pitot pressure sensors. The GSU 75 receive GPS data from the GIA
63Ws, and magnetic heading from the GMU 44 Magnetometer.
The GSU receives primary electrical power from the Essential Bus and a secondary power
supply from Avionics Bus 1. The GSU provides electrical power to the onside GMU 44
Magnetometer and the GTP 59 OAT probe.
The GSU connects to the existing pitot/static ports.
Each GSU 75 provides the following information via ARINC 429 busses to both GIAs, the PFD
and the MFD.
•Aircraft altitude and airspeed
•Aircraft vertical speed, Mach and outside air temperature
•Aircraft heading, pitch and roll
•Aircraft yaw, pitch and roll rates
•Aircraft body-axis accelerations
•Rates of change of heading, pitch and roll
•Aircraft accelerations expressed in a local level frame of reference
Figure 2-3 GSU-75 ADAHRS with Connector and Mounting Tray

G1000 Supplemental Maintenance Manual Page 2-4
Textron Nav III Series Revision 3
190-02128-04
GDL 69A SXM Datalink
The GDL 69A SXM provides SiriusXM Radio weather and music entertainment through means
of a dedicated satellite data link. The GDL 69A SXM is mounted behind the instrument panel in
the 182 and 206 models and in the aft avionics area for 172 models. Power to the GDL 69A
SXM is received from the Avionics No. 1 bus. The GDL 69A SXM sends weather data through
the HSDB bus to the MFD, where the data link interface is controlled. Audio is sent directly to
the GMA 1347 Audio Panel.
Figure 2-4, GDL 69A SXM Datalink

G1000 Supplemental Maintenance Manual Page 2-5
Textron Nav III Series Revision 3
190-02128-04
2.2 G1000 Optional Interfaces
There are no new optional interfaces approved as part of this STC. Refer to the G1000 Nav III
Line Maintenance Manual for optional interfaces.
2.3 Electrical Power Distribution
The electrical power distribution has not changed as a result of this STC. Refer to the G1000
Nav III Line Maintenance Manual for power distribution.
2.4 Pitot/Static System
The layout of the pitot/static system has not changed as a result of this STC, except that the
plumbing has been rerouted from the instrument panel area to the tail avionics area for 182 and
206 models.
2.5 GDU 1054B and GDU 1050 Displays
The location and function of the controls on the GDU 1054B or GDU 1050 displays are
unchanged from those described for the GDU 1040 or GDU 1044B in the G1000 Nav III Line
Maintenance Manual.
2.6 Softkeys
Some pages have commands or selections that are activated by the GDU 1054B or GDU 1050
softkeys. If a softkey is associated with a command, that command will be displayed directly
above the key. A grayed-out softkey shows a command that is unavailable. A softkey that is
highlighted (green bar) shows the current active selection.
Figure 2-5, G1000 Softkeys
2.7 FMS Knob
The FMS knob is the primary control for the G1000 system.
To cycle through different configuration screens:
To change page groups: Rotate the large FMS knob.
To change pages in a group: Rotate the small FMS knob.
To activate the cursor for a page, press the small FMS knob directly in, as one would push a
regular button.
To cycle the cursor through different data fields, rotate the large FMS knob.
To change the contents of a highlighted data field, rotate the small FMS knob. This action
either brings up an options menu for the particular field, or in some cases allows the operator to
enter data for the field.
To confirm a selection, press the ENT key.

G1000 Supplemental Maintenance Manual Page 2-6
Textron Nav III Series Revision 3
190-02128-04
To cancel a selection, press the small FMS knob in again, deactivating the cursor. The CLR
key may also be used to cancel a selection or deactivate the cursor.
2.8 G1000 Normal Mode
To start the G1000 system in Normal Mode:
1. With a ground power unit connected to the external power receptacle, turn ON the BAT
(battery) switch. The following G1000 equipment is powered on:
•PFD display
•GSU 75 ADAHRS
•GIA #1 (NAV and COM)
•GEA 71 Engine/Airframe Unit
2. Turn ON the AVIONICS BUS 1 and AVIONICS BUS 2 switches. The following G1000
equipment is powered on:
•PFD (secondary power)
•MFD
•GSU 75 ADAHRS (secondary power)
•GIA #1 (NAV) (secondary power)
•GEA 71 Engine/Airframe Unit (secondary power)
•GTS 800 Traffic System (if installed)
•GTX Mode S/ADS-B Transponder
•GIA #2 (NAV and COM)
•GMA Audio Panel
•GSA Servos
The G1000 system is now powered in the normal mode. In the normal operating mode, data
fields that are invalid have large red X’s through them. A valid field does not display a red X.
Allow the displays to initialize for approximately one minute for the red X’s to be removed.
The PFD and MFD will function as specified in the G1000 Cockpit Reference Guide when the
system has been correctly installed and configured.
Figure 2-6, Normal Mode

G1000 Supplemental Maintenance Manual Page 2-7
Textron Nav III Series Revision 3
190-02128-04
2.9 Reversionary Mode
Reversionary mode allows for display of information related to safe flight in the event of a
display communication or hardware failure. The PFD automatically goes into reversionary
mode when communication to the MFD is lost. Manual reversionary mode allows the operator
to force the PFD and MFD into reversionary mode by pressing the large red button labeled
‘DISPLAY BACKUP’ on the GMA 1347 audio panel.
NOTE
When the ‘DISPLAY BACKUP’ button is pushed to exit reversionary mode, there
is a 5-second delay until the display returns to normal mode. If the ‘DISPLAY
BACKUP’ button is pushed again during this 5-second delay, the display will reset
the five second delay timer.
Figure 2-7, Automatic Reversion with MFD failure