Cockpit Reference Guide

Garmin G1000 Cockpit Reference Guide for the Hawker Beechcraft C90A/GT/GTi
190-00664-02 Rev. B 79
Annunciations & Alerts
Flight
Instruments
Nav/Com/
XPDR/Audio AFCS GPS Nav
Flight
Planning Procedures
Hazard
Avoidance
Additional
Features Annun/Alerts Appendix Index
GRS 77 MESSAGE ADVISORIES (CONT.)
Message Comments
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The #1 AHRS earth magnetic field model is out of
date.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.
AHRS2 SRVC – AHRS2 Magnetic-
field model needs update.
The #2 AHRS earth magnetic field model is out of
date.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.
GEO LIMITS – AHRS2 too far
North/South, no magnetic compass.
MANIFEST – GRS1 software
mismatch, communication halted.
The #1 AHRS has incorrect software installed.
The system should be serviced.
MANIFEST – GRS2 software
mismatch, communication halted.
The #2 AHRS has incorrect software installed.
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 system
should be serviced.
HDG FAULT – AHRS2
magnetometer fault has occurred.
A fault has occurred in the #2 GMU 44.
Heading is flagged as invalid. The AHRS uses
GPS for backup mode operation. The system
should be serviced.
MANIFEST – GMU1 software
mismatch, communication halted.
The GMU 44 has incorrect software installed.
The system should be serviced.
MANIFEST – GMU2 software
mismatch, communication halted.