
Garmin G1000 Cockpit Reference Guide for the DA40/40F
190-00324-11 Rev. C
112
Annunciations & Alerts
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Abnormal
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AlertsAppendixIndex
GRS 77 MESSAGE ADVISORIES (CONT.)
Message Comments
AHRS MAG DB
– AHRS magnetic
model database version mismatch.
The #1 AHRS earth magnetic field model is out
of date. Update magnetic field model when
practical.
GEO LIMITS
– AHRS1 too far
North/South, no magnetic compass.
The aircraft is outside geographical limits for
approved AHRS operation. Heading is flagged
as invalid.
MANIFEST
– GRS1 software
mismatch, communication halted.
The #1 AHRS has incorrect software installed.
The G1000 system should be serviced.
GSR 56 MESSAGE ADVISORIES
Message Comments
GSR1 FAIL
– GSR1 has failed. A failure has been detected in the #1 GSR 56.
The system should be serviced.
GMU 44 MESSAGE ADVISORIES
Message Comments
HDG FAULT
– AHRS1
magnetometer fault has occurred.
A fault has occurred in the #1 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.
GDC 74A MESSAGE ADVISORIES
Message Comments
MANIFEST
– GDC1 software
mismatch, communication halted.
The GDC 74A has incorrect software installed.
The G1000 system should be serviced.
ADC1 ALT EC
– ADC1 altitude error
correction is unavailable.
GDC1 is reporting that the altitude error
correction is unavailable.
ADC1 AS EC
– GDC1 software
mismatch, communication halted.
GDC1 is reporting that the airspeed error
correction is unavailable.
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