190-01115-01
G3X/G3X Touch Installation Manual - Troubleshooting
Rev. AC
Page 35-1
35 TROUBLESHOOTING
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 particular function.
Refer to the G3X Pilot’s Guide (190-01115-00) or the G3X Touch Pilot’s Guide (190-01754-00) for a
complete listing of System Status Messages.
For additional assistance, contact your G3X Dealer, then for further help (if needed), contact Garmin
Aviation Product Support at US Toll Free Number 1-888-606-5482, or US 1-913-397-8200.
NOTE
Any advisory or warning message indicated on the Info Page whlie 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.
35.1 General Troubleshooting
1. Review the airframe logbook to verify if any G3X or other avionics or 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. Have ground power put on the aircraft.
4. Turn on the G3X 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 and remove the interior panels 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 is able to move around during flight. This condition may cause
the wire to pull on or vibrate the connector, making intermittent connections.
4. Ensure that the affected LRU is mounted securely. Use a screwdriver to check the tightness of the
four mounting screws.
5. Look in the vicinity of the affected LRU for any heavy objects that may not be fastened tight to the
structure and induce vibration in the ADAHRS.
6. Look for evidence of water or fluid contamination in the area around the affected LRU.
7. Unplug the affected LRU’s connector and check for bent pins.
8. Inspect the wire harness clamp on the rear of the connector to verify that it is not too tight and
smashing/shorting the wires. If the wire clamp is installed upside down, it has sharp edges that can
cut into the wires. Verify the presence of protective wire wrap between the wires and the clamp.
If the condition is not resolved by following the preceding instructions, contact Garmin Product Support
for additional assistance. A Garmin Field Service Engineer may ask the technician to download the fault
logs to a PC and email the logs back to Garmin to help determine if the condition is caused by a G3X LRU
or in the aircraft.
