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Garmin G1000 Cockpit Reference Guide for the Columbia 350/400
12-16
SECTION 12 – ANNUNCIATIONS
& ALERTS
GMU 44 Message Advisories
Alerts Window Message Comments
HDG FAULT – AHRS1 magnetometer
fault has occurred.
A fault has occurred in the GMU 44. Heading is flagged as invalid. The AHRS uses
GPS for backup mode operation. The G1000 system should be serviced.
MANIFEST – GMU1 software
mismatch. Communication halted.
The GMU 44 has incorrect software installed. The G1000 system should be serviced.
GDL 69 Message Advisories
Alerts Window Message Comments
GDL69 CONFIG – GDL 69 configura-
tion error. Config service req’d.
GDL 69 configuration settings do not match those of backup configuration memory.
The G1000 system should be serviced.
GDL69 FAIL
– GDL 69 has failed. A failure has been detected in the GDL 69. The receiver is unavailable. The G1000
system should be serviced
GDC 74A Message Advisories
Alerts Window Message Comments
GDC1 CONFIG – GDC1 configuration
error. Config service req’d.
GDC 74A configuration settings do not match those of backup configuration
memory. The G1000 system should be serviced.
MANIFEST – GDC1 software
mismatch. Communication halted.
The GDC 74A has incorrect software installed. The G1000 system should be
serviced.
BACKUP PATH – ADC1 using backup
data path.
The GDC 74A is using a backup communications data path. The G1000 system
should be serviced when possible.
GCU 476 Message Advisories
Alerts Window Message Comments
GCU CNFG – GCU Config error. Con-
fig service req’d.
GCU 476 configuration settings do not match those of backup configuration memory.
The G1000 system should be serviced.
GCU FAIL – GCU is inoperative. The GCU 476 has failed. The G1000 system should be serviced when possible.
GCU PATH – A GCU path has failed. The GCU 476 is using a backup communications data path. The G1000 system
should be serviced when possible.