GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual
Page 18
190-02291-01
Revision 1
5. Troubleshooting
This section provides information to assist with troubleshooting if problems occur. See the GFC
500 Autopilot Configuration Log retained in the aircraft permanent records for a list of the
system configuration data. When troubleshooting the GFC 500 Autopilot, refer to the
interconnect diagrams retained with the aircraft permanent records.
Before troubleshooting the GFC 500 Autopilot, ensure that system configuration settings match
those recorded in the completed GFC 500 Autopilot Configuration Log that is retained in the
aircraft permanent records.
NOTE: For error message troubleshooting specific to the G5/GAD 29()/GMU 11 installation,
refer to the Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual
including ICA, p/n 190-01112-11.
5.1 GFC 500 Failure Messages
During operation of the GFC 500 Autopilot, the G5 may annunciate a failure or fault that is
specific to the GFC 500 Autopilot. Contact Garmin Technical Support for assistance in
troubleshooting the problem.
5.2
General Troubleshooting
5.2.1
General GFC 500 Troubleshooting
If the GFC 500 will not engage, the following troubleshooting steps may be used to help identify
the cause.
1. Verify that there are no red-X indications present on the G5. Correct any red-X
indications that may be present. Refer to the G5 STC Maintenance Manual, Garmin p/n
190-01112-11 for further details.
2. Check for loose terminals on the circuit breaker connections on the power wire(s)
causing intermittent power connections. Also, check for intermittent circuit breakers.
3. Check that all connectors are fully seated, and that the jack screw connectors are fully
tightened on both sides of all connectors.
4. Check the security of harness attachments. If the harness is able to move around during
flight, the wires could pull on or vibrate the connector, causing intermittent connections.
5. Ensure that the GMC 507 is securely fastened to the panel or rack.
6. Check the wiring harness for faults, defects, or shorts to ground.
7. Disconnect the connectors on the GMC 507 and/or GSA 28s and check for any bent
pins or evidence of corrosion.
8. Check the AP Disc switch to verify it is not shorted.
a. Restart the G5 ADI in configuration mode.
b. Navigate to the Flight Controls page group.
c. Navigate to the "A
utopilot Roll”, “Autopilot Pitch”, “Pitch Trim” (if installed), and
“Mode Control Panel” pages.
i. On each of the above pages, scroll down to the line item labeled AP Disc Input.
With the AP DISC/TRIM INT switch not depressed, the line should read
Содержание GFC 500
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