Final System Checkout; Gps Failure Test - Garmin G1000 NAV III Line Maintenance Manual

5

FINAL SYSTEM CHECKOUT

This final checkout tests various secondary communications paths to ensure that the paths function correctly.
Perform the following steps and verify the results of each test.

5.1 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 GIA 1 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 GIA 2 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.
G1000 Nav III Line Maintenance Manual
190-00352-00
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.
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