Troubleshooting; Gmc 605 Configuration Mode Test Faults; Table 5-1 - Configuration Mode Test Faults - Garmin GFC 600 Manual

5. Troubleshooting

This section provides information to assist with troubleshooting if problems occur. See the GFC
600 AFCS Configuration Log retained in the aircraft permanent records for a list of the
interfaced equipment and system configuration data. When troubleshooting the GFC 600
AFCS, refer to the interconnect diagrams retained with the aircraft permanent records.
Before troubleshooting the GFC 600 AFCS, ensure that system configuration settings match
those recorded in the completed GFC 600 AFCS Configuration Log that is retained in the
aircraft permanent records.

5.1 GMC 605 Configuration Mode Test Faults

During initial installation, or during certain periodic maintenance tasks, there may be tests done
in configuration mode. During these tasks, there could be fault messages displayed. Refer to
Table 5-1 below for troubleshooting steps.
Procedure Annunciated Fault
Engine Run-Up test TEST FAILED:
TIMEOUT
OR
Pitch/Roll Offset
TEST FAILED:
Calibration test
INVALID READY
STATE
TEST FAILED:
AIRCRAFT IN
MOTION
TEST FAILED: GRS
NOT CALIBRATED
TEST FAILED:
UNKNOWN
FAILURE
GFC 600 AFCS Part 23 AML STC Maintenance Manual
190-01938-00
Table 5-1 – Configuration Mode Test Faults
Possible Cause
Data communications
failure
Mounting orientation in
configuration is incorrect or
the sub-procedure is not
known
Aircraft is moving, or
incorrect sensor calibration,
or sensor failure, or
incorrect air data
information.
Sensor calibration is not
done. Inertial and
temperature sensor
calibration data may be
corrupted.
AHRS provided invalid
failure code
Troubleshooting
Approach
Check system wiring.
Ensure that configuration
settings are the same as
those retained with the
aircraft records.
Make sure that GMC
605 rack is mounted as
shown in the Installation
manual
Verify valid GPS or air
data is available to the
GMC.
Contact Garmin Aviation
Product Support using
the contact information
in Section 1.7
Contact Garmin Aviation
Product Support using
the contact information
in Section 1.7
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