Garmin G1000 Reference Manual page 100

Annunciations & Alerts
GIA 63W MESSAGE ADVISORIES (CONT.)
Message
COM1 PTT – COM1 push-to-talk
key is stuck.
COM2 PTT – COM2 push-to-talk
key is stuck.
LOI – GPS integrity lost. Crosscheck
with other NAVS.
GPS NAV LOST – Loss of GPS
navigation. Insufficient satellites.
GPS NAV LOST – Loss of GPS
navigation. Position error.
GPS NAV LOST – Loss of GPS
navigation. GPS fail.
ABORT APR – Loss of GPS
navigation. Abort approach.
APR DWNGRADE – Approach
downgraded.
TRUE APR – True north approach.
Change HDG reference to TRUE.
GPS1 SERVICE – GPS1 needs
service. Return unit for repair.
GPS2 SERVICE – GPS2 needs
service. Return unit for repair.
NAV1 SERVICE – NAV1 needs
service. Return unit for repair.
NAV2 SERVICE – NAV2 needs
service. Return unit for repair.
G/S1 FAIL – G/S1 is inoperative.
G/S2 FAIL – G/S2 is inoperative.
84
Garmin G1000 Cockpit Reference Guide for the Cessna Citation Mustang
Comments
The COM1 and/or COM2 external push-to-talk
switch is stuck in the enable (or "pressed") position.
Press the PTT switch again to cycle its operation. If
the problem persists, the system should be serviced.
GPS integrity is insufficient for the current phase
of flight.
Loss of GPS navigation due to insufficient
satellites.
Loss of GPS navigation due to position error.
Loss of GPS navigation due to GPS failure.
Abort approach due to loss of GPS navigation.
Vertical guidance generated by SBAS is
unavailable, use LNAV only minimums.
Displayed after passing the first waypoint of a true
north approach when the nav angle is set to ' A UTO'.
A failure has been detected in the GPS1 and/
or GPS2 receiver. The receiver may still be
available. The system should be serviced.
A failure has been detected in the NAV1 and/
or NAV2 receiver. The receiver may still be
available. The system should be serviced.
A failure has been detected in glideslope
receiver 1 and/or receiver 2. The system should
be serviced.
190-00600-04 Rev. A