Gps Failure Test - Garmin G1000 Maintenance Manual

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8.1

GPS FAILURE TEST

Step
Single GPS Failure Conditions:
1. Place a metal shroud (sufficient enough to
block a GPS signal) over the GPS antenna
for GIA1 to prevent signal reception. Verify
loss of signal on MFD AUX page.
2. Check for desired results.
3. Remove shroud from the GIA 1 GPS
antenna.
4. Place a metal shroud (sufficient enough to
block a GPS signal) over the GPS antenna
for GIA2 to prevent signal reception. Verify
loss of signal on MFD AUX page.
5. Check for desired results.
6. Remove shroud from the GIA 2 GPS
antenna.
Dual GPS Failure Conditions:
1. Cover both GPS antennas. Verify loss of
signal on MFD AUX page.
2. Check for desired results.
3. Remove shrouds from GPS antennas.
4. Allow both receivers to re-acquire satellite
signals before continuing.
Page 8-2
Rev. B
Desired Result
GPS Failure - For each of the specified GPS failure
conditions, the following shall remain valid on the
PFD throughout the procedure:
•
Attitude and Heading from AHRS.
•
Airspeed, Altitude, Vertical Speed, and OAT from
Air Data Computer.
•
GPS CDI remains valid on PFD.
Dual GPS Failure - For a dual GPS failure, the
following shall occur:
•
GPS CDI flags INTEG on PFD.
•
Attitude and Heading remain valid from AHRS.
•
Airspeed, Altitude, Vertical Speed, and OAT
remain valid from Air Data Computer.
G1000 System Maintenance Manual
190-00907-00