
190-00600-01 Rev. C
Garmin G1000 Cockpit Reference Guide for the Cessna Citation Mustang
68
Annunciations & Alerts
GRS 77 Message Advisories (Cont.)
Message Comments
AHRS1 GPS
– AHRS1 using backup
GPS source.
The #1 AHRS is using the backup GPS path.
Primary GPS path has failed. The G1000
system should be serviced when possible.
AHRS2 GPS
– AHRS2 using backup
GPS source.
The #2 AHRS is using the backup GPS path.
Primary GPS path has failed. The G1000
system should be serviced when possible.
AHRS1 GPS
– AHRS1 not receiving
any GPS information.
The #1 AHRS is not receiving any or any
useful GPS information. Check AFMS
limitations. The G1000 system should be
serviced.
AHRS2 GPS
– AHRS2 not receiving
any GPS information.
The #2 AHRS is not receiving any or any
useful GPS information. Check AFMS
limitations. The G1000 system should be
serviced.
AHRS1 GPS
– AHRS1 not receiving
backup GPS information.
The #1 AHRS is not receiving backup GPS
information. The G1000 system should be
serviced.
AHRS2 GPS
– AHRS2 not receiving
backup GPS information.
The #2 AHRS is not receiving backup GPS
information. The G1000 system should be
serviced.
AHRS1 GPS
– AHRS1 operating
exclusively in no-GPS mode.
The #1 AHRS is operating exclusively in
no-GPS mode. The G1000 system should be
serviced.
AHRS2 GPS
– AHRS2 operating
exclusively in no-GPS mode.
The #2 AHRS is operating exclusively in
no-GPS mode. The G1000 system should be
serviced.
AHRS MAG DB
– AHRS magnetic
model database version mismatch.
The #1 AHRS and #2 AHRS magnetic model
database versions do not match.
AHRS1 SRVC
– AHRS1 Magnetic-
field model needs update.
The #1 AHRS earth magnetic field model is
out of date. Update magnetic field model
when practical.
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