Garmin G1000 NAV III Line Maintenance Manual page 110

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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.
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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.
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AHRS MON invalid: <STATE>
The AHRS monitor has detected that the AHRS data is invalid. The possible values for <STATE> are:
a. Mon Prmtr Invalid: The ARINC 429 data used by one of the monitors has not been received.
b. Attitude Prmtr Invalid: The ARINC 429 pitch or roll angle has not been received.
c. Exceeded Attitude Limits: The pitch or roll angle has exceeded the engagement limits.
d. Cross Hdg Accel Fail: Cross heading acceleration monitor failed.
e. Vert Accel Fail: Vertical acceleration monitor failed.
f. Fltrd Cross Hdg Accel Fail: Filtered cross heading acceleration monitor failed.
g. Fltrd Vert Accel Fail: Filtered vertical acceleration monitor failed.
h. Roll Accel Fail: Roll acceleration monitor has failed.
i. Normal Accel Fail: Normal acceleration has failed.
Troubleshoot the GRS 77 for the cause of the failure.
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Stuck switch invalidated parameter: <AXIS>
A MET switch in the specified axis is stuck.
Check the MET (trim) switches for proper operation.
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PRMTR: <PARAMETER> MODE:<MODE> Parameter lost
The mode specified by <MODE> has been disengaged because the parameter specified by
<PARAMETER> has become invalid. The following is a list of some of the possible values for
<PARAMETER>:
a. AD TDM Comm Valid: The specified mode has been disengaged because communication with the
servos, via the Time Division Multiplexer protocol, has been lost.
b. AP Pitch MET not stuck: The specified mode has been disengaged due to a stuck pitch MET switch.
Check the MET (trim) switches for proper identification.
Page 2-82
Rev. L
G1000 Nav III Line Maintenance Manual
190-00352-00