Garmin G1000 Checkout Procedure page 86

It is important that all actions are carried out in the order and at the precise elapsed time
as specified in the prepared test sequence.
8. When the operator has completed the actions specified in the test sequence, press the ENT
button to indicate that the process is complete. When this is done, the TEST COMPLETE field
stops blinking.
9. PFD1 informs the operator if the installation has passed or failed the magnetometer interference
test. If the test passes, no further action is required for this test.
If the test fails, the installation should be considered unreliable until the source of magnetic interference is
identified and remedied. When the magnetometer interference test fails, record the three magnetometer
maximum deviation values and their corresponding timestamps. Any maximum deviation value greater
than 5.0 milliGauss indicates a problem that must be resolved. Compare the corresponding timestamps
with the prepared test sequence to identify which action produced the problem. Contact Garmin for
assistance in resolving the problem.
Two common reasons for a failed magnetometer interference test are: 1) new equipment
is installed in close proximity to the GMU 44 magnetometer, and 2) an existing or new
electronic device has become grounded through the aircraft structure instead of via the
proper ground wire in a twisted shielded pair.
10. Press the ENT key on PFD1 to conclude this procedure.
5.3.6
Standby Compass Calibration
Perform standby compass calibration procedures. Reference
Practices" Raytheon (Hawker Beechcraft) King Air (A/B/C/E) Series Maintenance Manual Part No. 90-
590012-13 Revision B11 or later, section 34-20-00.
Page 5-10 G1000/GFC 700 Post Installation Checkout Procedure - Hawker / Beechcraft King Air C90
Revision 5
NOTE
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Attitude and Direction – Maintenance
190-00682-00