Troubleshooting; General Troubleshooting - Garmin G3X Touch Maintenance Manual

5.

TROUBLESHOOTING

This section provides instructions and guidance for G3X Touch EFIS troubleshooting.
Troubleshoot the G3X Touch EFIS by first identifying, then isolating the specific failure to the responsible
LRU. There are several indications the G3X Touch EFIS presents to the pilot or technician, showing overall
system condition. A course of action should be determined based on the information presented on the
display. This section shows possible scenarios likely to be encountered during normal operation and
provides troubleshooting guidance to the technician to resolve problems. Reference the interconnect
diagrams on the G3X Touch EFIS Part 23 AML STC Installation Manual (190-02472-01) and retained with
aircraft permanent records while troubleshooting the G3X system.
In this manual, the term 'Red-X' refers to a red "X" that appears on different areas of the display to indicate
the failure of that specific function.
IMPORTANT
Sections 6, 7 and 8 provide detailed instructions on equipment removal, replacement, configuration, and
return-to-service testing. Anytime a G3X Touch component or LRU is removed, swapped, or replaced, the
technician must follow the procedures given in Sections 6, 7, and 8 to ensure proper operation of the system.
Refer to the G3X Touch Pilot's Guide for Certified Aircraft (190-02472-00) for a complete listing of System
Status Messages.
For additional assistance, contact a G3X Touch Dealer, or Garmin Aviation Product Support at US Toll Free
Number 1-888-606-5482, or US 1-913-397-8200.
NOTE
Any warning message indicated on the "Messages" field or anywhere on the display while on-
ground should be investigated and resolved before flight.
NOTE
The information in this section is for troubleshooting use only and does not supersede any
approved Maintenance or Installation Manual instructions.
5.1

General Troubleshooting

1. Review the airframe logbook to verify if any G3X Touch EFIS or other avionics/electrical
maintenance had been performed recently that may have contributed to the failure.
2. Check for loose wire terminals on the circuit breaker connections on the power wire(s) causing
intermittent power connections. Also, check for intermittent circuit breakers.
3. Connect an auxiliary ground power unit and apply power to the aircraft.
4. Turn ON the G3X Touch EFIS and record the system software level on the GDU start up page.
5. After the system is initialized, note any Red-X's on the displays, ALERT messages and Red-X's on
the GDU.
If the failure cannot be verified, proceed to the following physical inspection.
1. Turn off the G3X Touch EFIS and remove the interior panels (as required) to gain access to the
ADAHRS. Inspect the physical installation of the affected LRU.
2. Check that the connectors are fully seated, and that the jack screw connectors are fully tightened on
both sides of the affected LRU's connector.
3. Check for a loose wire harness that could move around during flight. This condition may cause the
wire to pull on or vibrate the connector, creating intermittent connections.
4. Ensure the affected LRU is mounted securely. Check the tightness of the mounting hardware.
Maintenance Manual
G3X Touch EFIS Part 23 AML STC
Page 31
190-02472-02
Revision 2