User Guide
190-00494-00 Rev. B
Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang
A-14
APPENDIX A
GDC 74B 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 74B has incorrect software installed. The G1000 system should be serviced.
MANIFEST
– GDC2 software
mismatch. Communication halted.
GCU 475 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.
GMC 710 MESSAGE ADVISORIES
Message Comments
GMC CONFIG
– GMC Config error.
Config service req’d.
Error in the configuration of the GMC 710.
GMC FAIL
– GMC is inoperative. A failure has been detected in the GMC 710. The GMC 710 is unavailable.
MANIFEST
– GMC software
mismatch. Communication halted.
The GMC 710 has incorrect software installed. The G1000 system should be serviced.
GWX 68 ALERT MESSAGES
Message Comments
GWX CONFIG
– GWX configuration
error. Config service req’d.
GWX 68 configuration settings do not match those of the GDU configuration. The
G1000 system should be serviced.
GWX FAIL
– GWX is inoperative. The GDU is not recieving status packet from the GWX 68 or the GWX 68 is reporting
a fault. The GWX 68 radar system should be serviced.
GWX SERVICE
– Needs service.
Return unit for repair.
A failure has been detected in the GWX 68. The GWX 68 may still be usable.
WX ALERT
– Possible severe weather
ahead.
The GWX 68 indicates severe weather within ±10º of the aircraft heading at a range
of 80 to 320 nm.
MANIFEST
– GWX software
mismatch. Communication halted.
The GWX 68 has incorrect software installed. The G1000 system should be serviced.










