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LMM for the Kodiak 100
Page 4-95
190-02102-00 Rev.4
NOTE
Loss of the GIA that is the active FD will result in FD down mode to PIT/
ROL but AP will stay engaged.
4.7.12.2 AFCS Preflight Test Sequence and Troubleshooting
This section can help determine why the AFCS has failed the Preflight Test indicated by
the red PFT annunciation. It also defines the PFT sequence for the servos and the
AFCS, and provides troubleshooting information to help resolve failures.
The PFT is performed by both GIAs at startup, and must pass for both GIAs before the
autopilot can be engaged.
The PFT starts only if the GIAs and servos are configured, and the certification gains are
valid. If the PFT has not completed after one minute from when the initialization started,
the PFT will fail. After the system PFT has passed, it will be performed again if a servo
resets, if the autopilot servo breaker is reset, or the cross side GIA restarts it.
Typically, the PFT failure fault is logged in the GIA Maintenance Log and not in the Servo
Maintenance Logs unless the GIA log fault identifies a servo problem.
Aileron Mistrim
Right.
• Roll servo providing sustained force in the
indicated direction.
• Check for possible fuel imbalance.
• Check the aileron control adjustments.
• If the mistrim condition still exists, remove and
replace the roll servo.
Aileron Mistrim
Left.
Performing preflight
system test. Aural
alert sounds at
completion.
• Allow the system to complete preflight tests.
Preflight system
test failed. Aural
alert sounds at
failure.
• The preflight test should complete within 2
minutes. If it does not pass, the red PFT
annunciation is displayed.
• In case of PFT failure, refer to
PFT diagnosis.
Table 4-20. AFCS Annunciations (Continued)
Annunciation
Condition
Recommended Actions
Uncontrolled if Printed
Summary of Contents for Cessna Caravan G1000
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