Garmin Diamond DA 40 User Manual (English)

Questions and Answers:

D
duane11Aug 21, 2025
What to do if my Garmin GPS shows TAS FAIL AIRSPEED FAIL ALTITUDE FAIL VERT SPEED FAIL?
- A
  Andrea NealAug 21, 2025
  If your Garmin GPS displays these failures, inspect the GDC 74A pitot/static plumbing integrity, the pitot/static ports, and associated equipment. For TAS failure, also check the GTP 59 OAT probe. Verify the GDC ARINC 429 configuration settings for the PFD, MFD, GIA1, and GIA2. If the configuration settings are correct, replace the defective GDC configuration module. If the problem persists, replace the defective GDC 74A.
J
John YoungAug 23, 2025
What should I do if my Garmin Diamond DA 40 GPS says 'ALTERNATOR'?
- N
  Nicholas OconnellAug 23, 2025
  If your Garmin GPS shows an 'ALTERNATOR' alert, first check the alternator current sensor for proper operation. If the current sensor is functioning correctly, troubleshoot the alternator and aircraft electrical system following the instructions in the DA 40 Airplane Maintenance Manual.
A
aaronmccarthyAug 25, 2025
What does it mean if my Garmin Diamond DA 40 GPS displays 'OIL PRES LO'?
- E
  Elizabeth FosterAug 25, 2025
  If your Garmin GPS shows 'OIL PRES LO', first check the aircraft oil level. Then, troubleshoot the oil pressure sensor for proper operation. If the oil pressure sensor is working correctly, troubleshoot the engine oiling system according to the DA 40 Airplane Maintenance Manual instructions.
B
bethjohnsonAug 27, 2025
What to do if Garmin Diamond DA 40 indicates 'LOW VOLTS'?
- B
  Brandon Lewis DDSAug 27, 2025
  If your Garmin GPS indicates 'LOW VOLTS', inspect the GEA 71 connector and wiring. Then, troubleshoot the aircraft electrical system according to the DA 40 Airplane Maintenance Manual.
C
Chelsea BoothAug 27, 2025
Why does my Garmin Diamond DA 40 show 'ATTITUDE FAIL'?
- M
  Megan JohnsonAug 27, 2025
  If your Garmin GPS displays 'ATTITUDE FAIL', check the GRS ARINC 429 configuration settings for the PFD, MFD, GIA1, and GIA2. If needed, replace the defective GRS 77.
J
James WhiteAug 29, 2025
How to fix 'HDG FAIL' on Garmin Diamond DA 40 GPS?
- L
  Leonard GrossAug 29, 2025
  To address 'HDG FAIL' on your Garmin GPS, replace the GMU 44 with a known good unit. If the problem continues, replace the defective GRS 77.
T
Trevor DeckerAug 31, 2025
What to do if Garmin GPS displays 'FUEL PRES LO:'?
- A
  april71Aug 31, 2025
  If your Garmin GPS displays 'FUEL PRES LO:', troubleshoot the fuel pressure sensor for proper operation. If the fuel pressure sensor is working correctly, troubleshoot the fuel pump and associated fuel systems per the DA 40 Airplane Maintenance Manual.
J
Joshua BurgessSep 1, 2025
What to do if my Garmin Diamond DA 40 says 'XPDR FAIL'?
- J
  Jeffery FieldsSep 1, 2025
  If your Garmin GPS displays 'XPDR FAIL', check the GTX RS-232 configuration settings for GIA1, GIA2, and GTX 33. If needed, replace the defective GTX 33.
S
Samantha SheltonSep 3, 2025
Why is my Garmin Diamond DA 40 showing 'Engine/Airframe Sensors (All Invalid)'?
- J
  John DavisSep 3, 2025
  If your Garmin GPS shows 'Engine/Airframe Sensors (All Invalid)', check the GEA 71 RS-485 configuration settings for GIA1 and GIA2. Reconfigure the GEA 71 per Section 7.4.2. Check the GEA – GIA1 and GEA – GIA2 Wiring. If needed, replace the defective GEA 71.
S
Sheila MurphySep 4, 2025
What does 'PITOT FAIL' mean on my Garmin Diamond DA 40 and how do I fix it?
- T
  Theresa RobertsSep 4, 2025
  If your Garmin GPS shows 'PITOT FAIL', check the pitot heat switch position and inspect the GEA 71 connector & wiring. Then, troubleshoot the pitot heat system per the DA 40 Airplane Maintenance Manual.

Garmin Diamond DA 40 Specifications

General

Brand	Garmin
Model	Diamond DA 40
Category	GPS
Language	English

Summary

1 Introduction

1.1 Content, Scope, Purpose

Defines the manual's purpose, scope, and requirements for continued airworthiness.

1.2 Organization

Outlines the structure and content of each section within the manual.

1.3 Definitions/Abbreviations

Lists and explains acronyms, terms, and abbreviations used throughout the manual.

1.4 Reference Publications

Lists required and supplementary documents for performing maintenance tasks.

1.5 Distribution

Specifies how the document is distributed and managed.

2 System Description

2.1 Equipment Descriptions

Details the various G1000 components installed in the DA 40 aircraft.

2.2 Equipment Locations

Illustrates the physical placement of G1000 components within the DA 40 aircraft.

2.3 Remote Avionics Enclosure

Describes the enclosure housing G1000 LRUs and its associated components.

2.4 Electrical Power Distribution

Explains how power is supplied to the G1000 system from aircraft buses.

2.5 Lightning Strike Protection

Details modifications for protecting G1000 equipment from lightning strike effects.

2.6 SPIDER Grounds

Explains the SPIDER grounding system used for G1000 connectors.

2.7 Sensor Installations

Details the installation procedures for various engine and airframe sensors.

2.8 G1000 System Communications

Describes the communication interfaces and data flow between G1000 components.

3 G1000 Control & Operation

3.1 User Interface

Explains interaction with the G1000 system via FMS knob and softkeys.

3.2 G1000 Normal Mode

Details the procedure to start the G1000 system in its standard operational mode.

3.3 Reversionary Mode

Describes how the system enters reversionary mode due to failures and manual activation.

3.4 Configuration Mode Overview

Guides technicians on using Configuration Mode for setup, checking, and calibration.

3.5 Configuration Mode Navigation

Explains how to navigate through different pages and page groups in Configuration Mode.

4 G1000 Continued Airworthiness

4.1 Airworthiness Limitations

Specifies FAA-approved maintenance requirements for continued airworthiness.

4.2 Servicing Information

Provides information on 'on condition' servicing for G1000 LRUs.

4.3 On Condition Servicing

Details when replacement/servicing should occur based on observed conditions.

4.4 Maintenance Requirements

Lists required tests and checks at specific intervals for G1000 systems.

4.5 1000 Hour Inspection

Outlines the visual inspection procedure for G1000 components every 1000 hours.

4.6 Electrical Bonding Test

Describes the procedure for testing electrical bonding of G1000 equipment.

4.7 Fuel Tank Probe Re-Calibration

Provides procedures for recalibrating fuel tank probes after replacement.

4.8 GRS 77 Earth Magnetic Field Updates

Explains the process and necessity of updating the AHRS magnetic field model.

5 Troubleshooting

5.1 G1000 Alerting System

Explains how the G1000 alerts pilots using annunciations, windows, and softkeys.

5.2 System Annunciations

Details how LRU failures are annunciated with red 'X' marks on PFD/MFD.

5.3 DA 40-Specific Alerts

Lists specific alerts configured for the DA 40 aircraft, categorized by severity.

5.4 GDU 1040 Troubleshooting

Provides common problems and recommended actions for GDU 1040 displays.

5.5 GDU 1040 Alerts

Lists software/configuration and database alerts for GDU 1040 displays.

5.6 GMA Alerts

Details failure messages and causes related to the GMA 1347 audio panel.

5.7 GIA 63 Troubleshooting

Provides troubleshooting steps for COM, NAV, G/S, and GPS functions of the GIA 63.

5.8 GIA Alert Messages

Lists alert messages for COM, NAV, Glideslope, and GPS functions of the GIA 63.

5.9 GEA Troubleshooting

Addresses alerts and troubleshooting for the GEA 71 engine/airframe unit.

5.10 GTX Troubleshooting

Covers alerts and troubleshooting for the GTX 33 Mode S transponder.

5.11 GRS 77/GMU 44 Troubleshooting

Provides troubleshooting for GRS 77 AHRS and GMU 44 Magnetometer alerts.

5.12 GDC 74A Troubleshooting

Addresses alerts and troubleshooting for the GDC 74A Air Data Computer.

6 G1000 Equipment Removal & Replacement

6.1 GDU 1040 MFD & PFD

Details the removal and replacement procedures for the GDU 1040 MFD and PFD.

6.2 GMA 1347 Audio Panel

Provides steps for removing and replacing the GMA 1347 audio panel.

6.3 GIA 63 Integrated Avionics Units

Explains the procedures for removing and replacing GIA 63 units.

6.4 GEA 71 Engine/Airframe Unit

Details the removal and replacement steps for the GEA 71 unit.

6.5 GTX 33 Transponder

Covers the removal and replacement of the GTX 33 transponder.

6.6 GDC 74A Air Data Computer

Provides instructions for removing and replacing the GDC 74A.

6.7 GTP 59 OAT Probe

Details the removal and replacement of the GTP 59 Outside Air Temperature probe.

6.8 GRS 77 AHRS

Explains the removal and replacement process for the GRS 77 AHRS.

6.9 GMU 44 Magnetometer

Provides steps for removing and replacing the GMU 44 magnetometer.

6.10 Configuration Module Removal & Replacement

Details how to remove and replace the G1000 configuration module.

6.11 GEA 71 Backshell Thermocouple Removal & Replacement

Covers the removal and replacement of the GEA 71 backshell thermocouple.

7 G1000 Equipment Configuration & Testing

7.1 GDU 1040 MFD & PFD

Covers software loading, configuration, and testing for GDU 1040 displays.

7.2 GMA 1347 Audio Panel

Details software loading, configuration, and testing for the GMA 1347 audio panel.

7.3 GIA 63 Integrated Avionics Unit

Explains software loading, configuration, and testing for GIA 63 units.

7.4 GEA 71 Engine/Airframe Unit

Covers software loading, configuration, and testing for the GEA 71 unit.

7.5 GTX 33 Transponder

Details software loading, configuration, and testing procedures for the GTX 33.

7.6 GDC 74A Air Data Computer

Provides software loading, configuration, and testing for the GDC 74A.

7.7 GRS 77 AHRS / GMU 44 Magnetometer

Covers software loading, calibration, and testing for GRS 77 and GMU 44.

7.8 Software/Configuration Troubleshooting

Troubleshoots issues related to software and configuration loading.

8 System Return to Service Procedure

8.1 GPS Failure Test

Tests system behavior during single and dual GPS failure conditions.

8.2 GIA Failure Test

Tests system behavior during single and dual GIA failures.

8.3 Display Failure Test

Tests system response to MFD and PFD power removal.

8.4 AHRS/ADC Backup Path Test

Verifies the functionality of secondary AHRS/ADC data paths.

8.5 Flight Test

Outlines flight test requirements for G1000 system validation.

8.6 Maintenance Records

Specifies information to be recorded after maintenance and flight checks.

Appendix A Installation Data

A.1 G1000 Equipment List

Lists G1000 LRUs with compatible software versions and part numbers.

A.2 Additional Equipment Required

Lists necessary equipment and components for G1000 installation.

A.3 Optional Equipment

Details optional equipment that can be installed with the G1000 system.

A.4 Parts List

Provides a detailed list of parts used in the G1000 installation.

A.5 Weight & Balance

Lists weight and balance data for G1000 components.

Appendix B G1000 Software/Configuration Procedure

B.1 System Power Up

Details the procedure for powering up the G1000 system and verifying software.

B.2 MFD & PFD Software Load

Covers loading software onto the MFD and PFD using the Loader Card.

B.3 Initial G1000 Configuration

Guides through the initial configuration of the G1000 system after software loading.

B.4 GIA Software Load

Details the procedure for loading software onto the GIA 63 units.

B.5 GIA Configuration

Explains the configuration process for the GIA 63 units.

B.6 Final LRU Software Load

Covers loading software onto individual LRUs like GMA, GDC, GRS, GMU, GTX, GEA.

B.7 Final LRU Configuration

Details the final configuration steps for LRUs after software loading.

B.8 Software Load Confirmation

Verifies that software has been loaded correctly by checking LRU status.

B.9 Aviation Database Loading

Provides steps for updating the aviation database on the PFD and MFD.

B.10 Final System Testing

Outlines final system testing after software and database updates.

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