System Maintenance Manual

Page 5-74 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision F 190-00682-01
3. This page is protected and requires a keystroke password to perform this test. Press the following
softkeys in sequence:
i) softkey 9
ii) softkey 10
iii) softkey 11
iv) softkey 12
4. Select MAG INTERFERENCE TEST and press the ENT key.
5. Follow the checklist items displayed on the PFD, and press the ENT key as each one is completed
or confirmed.
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”. The list of
relevant electronic devices are given in Table 5-5. Begin test with flaps retracted, flight
controls in a neutral position and all lights selected OFF.
Table 5-5. Magnetometer Interference Test Sequence (Example)
Elapsed Time
since Start of
Test (min:secs)
Action
0:00 Test begins
0:10 Navigation lights on
0:20 Navigation lights off
0:30 Landing lights on
0:40 Landing lights off
0:50 Taxi lights on
1:00 Taxi lights off
1:20 Strobes on
1:40 Strobes off
1:50 Recognition lights on
2:00 Recognition lights off
2:10 Tail flood lights on
2:20 Tail flood lights off
2:30 Beacon on
2:40 Beacon off
2:50 Rudder full left
3:00 Rudder full right
3:10 Rudder trim left
3:20 Rudder trim right
3:30 Elevator full nose UP
3:40 Elevator full nose DN
3:50 End of test
6. 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.