Page 4-28
G1000 Nav III Line Maintenance Manual
Rev. L
190-00352-00
NOTE
The 3
rd
item on the checklist instructs the operator to “prepare a detailed test sequence with
precise start and stop times for exercising all electronic devices”. Only the electronic devices that
are likely to affect the operation of the GMU 44 magnetometer need be included in the test
sequence. The list of relevant electronic devices will vary from aircraft to aircraft. An example of
an appropriate test sequence is given in Table 4-2.
Elapsed Time
since Start of
Test (min:secs)
Action
0:00 Test
begins
0:10
Aileron full right
0:20 Aileron
full
left
0:30 Aileron
level
0:40 Flaps
down
0:50 Flaps
up
1:00
Landing gear up
1:20
Landing gear down
1:40
Speed brake up
1:50
Speed brake down
2:00 Navigation
lights
on
2:10 Navigation
lights
off
2:20 Landing
lights
on
2:30 Landing
lights
off
2:40 Taxi
lights
on
2:50 Taxi
lights
off
3:00
L Taxi lights on
3:10
L Taxi lights off
3:20 Strobes
on
3:30 Strobes
off
3:40
Recognition lights on
3:50
Recognition lights off
4:00
Turn on all wing-tip lights
simultaneously (typically will include
navigation lights, recognition lights and
strobe)
4:10
Turn off all wing-tip lights
simultaneously
4:20 Beacon
on
4:30 Beacon
off
4:40 Pitot
heat
on
4:50 Pitot
heat
off
5:00
End of test
Table 4-2. Example Magnetometer Interference Test Sequence
a)
When the CALIBRATE field is blinking, press the ENT key to begin the procedure, and have a
stopwatch ready to begin recording the elapsed time.
NOTE
It is important that the “time equals zero” moment corresponds with the moment the PFD first
displays the blinking TEST COMPLETE message.
Summary of Contents for G1000 NAV III
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