G1000 Nav III Line Maintenance Manual
Page 2-85
190-00352-00
Rev.
L
2.11.2.2.1
Monitor Processor
The monitor processor contains the logs that are found in these processors -
2 – Pitch Servo
4 – Roll Servo
8 – Pitch Trim Servo
There are two main groupings of faults that can occur in the monitor processor:
The first grouping of faults can occur during the GSA unit pre-flight test (PFT). If there is a fault during PFT the
unit will not be able to transition to normal mode and the only way to clear this state would be to cycle unit
power.
The second grouping of faults can occur during normal mode. These faults generally cause a disconnect of power
to the GSA and report that a fault has occurred to the GIA.
The Notes column indicates any actions that can be taken to troubleshoot the problem in the aircraft by the
technician. Any faults that are not listed here indicate an internal problem requiring replacement of the servo. If
the items in the Notes column check out ok, replace the servo.
PFT Faults
MONITOR PFT STEP
NOTES
"INTERNAL COMM FAIL"
This can sometimes be a result of a failure on the other internal servo
board, check faults on the other processor
"UNSW POWER INV"
Check unit power
"MON SOL PWR ON FAIL"
Check unit power and AP Disconnect power
"CTL SOL PWR ON FAIL"
Check unit power and AP Disconnect power
"SOL PWR FAIL"
Check unit power and AP Disconnect power
"CERT DATA UNINSTALLED"
Upload the certification gain file to the Monitor board
"STRAP CODE MISMATCH"
Check the connector strap inputs to the unit
Normal Mode Faults
MONITOR FAULT
NOTES
"GIA DIS FAULT"
Check the AP Disconnect power into the unit
"HOST DATA DIF"
Check the AHRS wiring to the system
"HOST DATA INV"
Check the AHRS wiring to the system
"SVO PWR INV"
Check unit power and AP Disconnect power
“STRP CODE CHNG”
Check the connector strap inputs to the unit
“MET STUCK SWTCH”
Check the MET switch inputs into the system
“MET STATUS DIF”
Check the MET switch inputs into the system
Summary of Contents for G1000 NAV III
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