Garmin G1000 Maintenance Manual page 105

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The GIA Maintenance Log can record any of the following faults:
•
FCS Task not started: Bad gains
The FCS task has not started because the gains are not present or have been corrupted.
Reload the gain files to correct.
•
FCS Task not started: Gain structure out of range
The FCS task has not started because the gains are not compatible with the GIA software.
Reload the gain files to correct.
•
PFT FAIL: Timeout, <STEP>
Pre-flight test has failed because the specified step has not passed in the allotted time. See
the GIA pre-flight steps for a description of the possible values for <STEP> on the failed GIA
and corrective actions.
•
PFT FAIL: Cross GIA Failed, State: <STEP>
Pre-flight test has failed on opposite GIA. <STEP> specifies the pre-flight test step on
selected GIA that was in progress when the pre-flight test failed on the opposite GIA. See
the GIA pre-flight steps for a description of the possible values for <STEP> on the failed GIA
and corrective actions.
•
PFT FAIL: <STEP>
Pre-flight has failed because the step specified has failed. See the GIA pre-flight test steps
for a description of the possible values for <STEP> on the failed GIA and corrective actions.
•
AHRS MON invalid: <STATE>
The AHRS monitor has detected that the AHRS data is invalid. The possible values for
<STATE> are:
Mon Prmtr Invalid: The ARINC 429 data used by one of the monitors has not been
received.
Attitude Prmtr Invalid: The ARINC 429 pitch or roll angle has not been received.
Exceeded Attitude Limits: The pitch or roll angle has exceeded the engagement
limits.
Cross Hdg Accel Fail: Cross heading acceleration monitor failed.
Vert Accel Fail: Vertical acceleration monitor failed.
Fltrd Cross Hdg Accel Fail: Filtered cross heading acceleration monitor failed.
Fltrd Vert Accel Fail: Filtered vertical acceleration monitor failed.
Roll Accel Fail: Roll acceleration monitor has failed.
Normal Accel Fail: Normal acceleration has failed.
Troubleshoot the GRS 77 for the cause of the failure.
G1000 System Maintenance Manual
190-00907-00
Page 5-69
Rev. B