Garmin G1000 Nxi System Maintenance Manual page 392

Step
Dual GPS Failure Condition:
1. Ensure GPS satellites are acquired.
2. Cover both GPS antennas. Verify loss of signal
on Aux – GPS Status page.
3. Check for desired results.
4. Remove shrouds from GPS antennas.
5. Allow both receivers to re-acquire satellite
signals before continuing.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Desired Result
For a dual GPS failure condition, the following shall occur:
•
GPS CDI flags LOI on both PFDs.
•
Attitude and Heading remain valid from both AHRS
on both PFDs.
•
Airspeed, Altitude, Vertical Speed and OAT remain
valid from both Air Data Computers on both PFDs.
•
LOI appears on MFD Map.
•
TAWS N/A aural alert & annunciation given.
When GPS satellites are re-acquired, verify that the INTEG
OK annunciation is given on the HSI in white for a brief
period of time then disappears.
After ~10 seconds of stable GPS position reacquisition,
verify the TAWS AVAILABLE aural alert is given.
Verify that the system returns to normal navigation mode
(GPS CDI restored, LOI annunciation removed, & GPS
data magenta).
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