Cockpit Reference Guide
Garmin G1000 Cockpit Reference Guide for the Beechcraft 300/B300 Series
190-01344-01 Rev. A
118
Annunciations & Alerts
Flight
Instruments
Nav/Com/
XPDR/AudioAFCSGPS Nav
Flight
PlanningProcedures
Hazard
Avoidance
Additional
FeaturesAnnun/AlertsAppendixIndex
Message Comments
GWX SERVICE
– GWX needs
service. Return unit for repair.
A failure has been detected in the GWX 68/70.
The GWX 68/70 may still be usable.
GWX MANIFEST
– GWX software
mismatch, communication halted.
The GWX 68/70 has incorrect software installed.
The system should be serviced.
WX ALERT
– Possible severe
weather ahead.
Possible severe weather detected within +/- 10
degrees of the aircraft heading at a range of 80
to 320 nm.
GDC 74B/7400 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.
ADC1 SERVICE
– ADC1 needs
service. Return unit for repair
The GDC1 and/or GDC2 self-test has detected
a problem in the unit. The system should be
serviced
ADC2 SERVICE
– ADC1 needs
service. Return unit for repair
GDC1 MANIFEST
– GDC1 software
mismatch, communication halted.
The GDC has incorrect software installed. The
system should be serviced.
GDC2 MANIFEST
– GDC2 software
mismatch, communication halted.
GCU 477 MESSAGE ADVISORIES
Message Comments
GCU CNFG
– GCU Config error.
Config service req’d.
GCU 477 configuration settings do not match
those of backup configuration memory. The
G1000 system should be serviced.










