
Garmin G1000 Cockpit Reference Guide for the Piper PA-46 Meridian
190-00764-02 Rev. A
82
Annunciations & Alerts
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AlertsAppendixIndex
GDC 74A MESSAGE ADVISORIES
Message Comments
ADC1 ALT EC
– ADC1 altitude error
correction is unavailable.
GDC1 or GDC2 is reporting that the altitude
error correction is unavailable.
ADC2 ALT EC
– ADC2 altitude error
correction is unavailable.
ADC1 AS EC
– ADC1 airspeed error
correction is unavailable.
GDC1 or GDC2 is reporting that the airspeed
error correction is unavailable.
ADC2 AS EC
– ADC2 airspeed error
correction is unavailable.
MANIFEST
– GDC1 software
mismatch, communication halted.
The GDC 74A has incorrect software installed.
The G1000 system should be serviced.
MANIFEST
– GDC2 software
mismatch, communication halted.
GCU 476 MESSAGE ADVISORIES
Message Comments
GCU CNFG
– GCU Config error.
Config service req’d.
GCU 475 configuration settings do not match
those of backup configuration memory. The
G1000 system should be serviced.
GCU FAIL
– GCU is inoperative. A failure has been detected in the GCU 475.
The GCU 475 is unavailable.
MANIFEST
– GCU software
mismatch, communication halted.
The GCU 475 has incorrect software installed.
The G1000 system should be serviced.
GCU KEYSTK
– GCU [key name]
Key is stuck.
A key is stuck on the GCU 475 bezel. Attempt
to free the stuck key by pressing it several times.
The G1000 system should be serviced if the
problem persists.
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