GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 25
190-01938-00 Revision 13
5.2 GMC 605 Normal Mode Failure Annunciations
During normal operation of the GFC 600 AFCS, the GMC 605 may annunciate a failure.
Consult Table 5-2 below for assistance in troubleshooting.
Table 5-2 – Normal Mode Failures
Check that the GI 285 electrical connector is
securely attached.
Verify wiring between GMC 605 and GI 285.
Check each servo and verify that the electrical
connectors are securely attached.
Verify wiring between GMC 605 and all installed
servos.
Invalid attitude (including AHRS
monitor and attitudes outside
engage limits)
Recycle GFC 600 power.
Verify wiring between GMC 605 and Air Data
Computer (or ADM).
Verify wiring between GMC 605 and GPS 232
connections.
AP Disconnect in invalid state
Ensure that the AP DISC / TRIM INT switch is not
stuck or shorted.
Verify wiring between GMC 605 and AP
DISC/TRIM INT Switch.
Air Data Inputs have failed
If the system is interfaced to an air data computer,
verify that the air data computer is functioning
properly.
If the system includes an ADM, verify that the
ADM wiring harness is securely attached to the
mating connector on the ADM and that there are
no chafed or broken wires.
Ensure that the pitot and static systems are free of
debris and obstructions.
Check the pitch trim servo and verify that the
electrical connector is securely attached.
Verify wiring between Pitch Trim Servo and GMC
600.
Verify that the aircraft has a pitch trim servo
installed. If it does not, verify the configuration of
the GMC 605.
Check the trim switch and ensure that both halves
operate smoothly in both directions.
Verify wiring between the trim switch and the
GMC 605.
PFT not passed
Invalid Attitude (including AHRS
monitor and attitudes outside
engage limits)
Recycle GFC 600 power.
Verify wiring between GMC 605 and Air Data
Computer (or ADM).
Verify wiring between GMC 605 and GPS 232
connections.
To Next Page
Loading...
Need help?
General
