G900X/G950 Installation and Maintenance Manual – PICP & Warranty Registration
Page C-51
190-00719-00
Revision D
C.2.22 Final System Checkout (Three-Display Systems)
The final checkout tests exercise various secondary communications paths in the G900X to ensure that
the desired backup paths are in place. Additional aircraft systems checks are also performed in this
section. Perform the following steps and verify the results of each test.
C.2.22.1 GPS Failure Test
Step Desired
Result
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 4.
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 4.
5. Check for desired results.
6. Remove shroud from the GIA 2 GPS
antenna.
GPS Failure - For each of the specified GPS failure
conditions, the following shall remain valid on the
PFD throughout the procedure:
9
Attitude and Heading from AHRS.
9
Airspeed, Altitude, and Vertical Speed from Air
Data Computer.
9
GPS CDI remains valid on PFD.
9
“BOTH ON GPS1” or “BOTH ON GPS2”
reversionary sensor annunciations appear on
both PFDs.
Dual GPS Failure Conditions:
1.
Cover both GPS antennas. Verify loss of
signal on MFD AUX page 4.
2.
Check for desired results.
3.
Remove shrouds from GPS antennas.
4.
Allow both receivers to re-acquire satellite
signals before continuing.
Dual GPS Failure - For a dual GPS failure, the
following shall occur:
9
GPS CDI flags INTEG on PFD.
9
Attitude and Heading remain valid from AHRS.
9
Airspeed, Altitude, and Vertical Speed, remain
valid from Air Data Computer.
