Garmin G1000 Maintenance Manual page 106

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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>:
AD TDM Comm Valid: The specified mode has been disengaged because
communication with the servos, via the Time Division Multiplexer protocol, has been lost.
Troubleshoot possible loss of communication paths to servos or loss of servo/AP
disconnect power to the servos.
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 operation.
GIA Pre-Flight Test Steps
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PFT Step 0: System initializing, verify GFC powered
This step checks to ensure the GFC is powered up.
Ensure the GIA is connected to the autopilot disconnect on the GFC Configuration page.
Ensure all configured servos are communicating on the System Status page.
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PFT Step 1: System initializing, verify GIA audio is valid
This step checks to ensure the GIA audio region has been loaded and configured.
Load GIA audio files to correct.
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PFT Step 2: System initializing, verify required servos are configured
This step checks to ensure the current servo configuration matches the servo configuration
specified in the certification gain file.
Reload the gain files to correct.
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PFT Step 3: System initializing, verify selected side
This step checks to ensure the PFD is online and sending the selected AFCS side data over
HSDB to the GIA.
Ensure the PFD is turned on.
Ensure the Ethernet connection from the PFD to the GIA is functioning.
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PFT Step 4: System initializing, verify AHRS monitor
This step checks to ensure the AHRS monitor is valid and not reporting an AHRS failure.
NOTE: AHRS monitor will be assumed valid if on the ground.
Ensure the GRS 77 and GDC 74A are turned on and sending valid data.
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PFT Step 5: System initializing, verify configured servos are valid
Page 5-70
Rev. B
G1000 System Maintenance Manual
190-00907-00