Service difficulty report · Autopilot Sys · Doug MD11F

Difficulty date
June 29, 2025
Submitted
July 16, 2025
Operation
Air carrier
Aircraft
N289UP
Make and model
Doug MD11F
Aircraft serial
48455
Aircraft time
107,783 hours, 22,052 cycles
Part
Autopilot Sys
Condition
Inoperative
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

HAND FLEW THE ENTIRE FLIGHT WITH NO AUTOPILOT AND REQUIRED 3 DEGREES OF AILERON TRIM UPON FURTHER INVESTIGATION, PER MEL 27-13-2-0-1 AILERON DEFLECT INOP IS NOT TO BE DISPLAYED PRIOR TO BREAKER LOCKOUT AND ALLOWABLE DEFLECTION A NEUTRAL MUST BE 0 PLUS OR MINUS 1. FOUND AILERON DEFLECT INOP MESSAGE DISPLAYED AND INDICATED DEFLECTION OF LT O/B AILERON TO BE 6.875 DEGREES. THIS IS THE CAUSE FOR TRIM.

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