What was found
4 UN-COMMANDED LEFT YAW EVENTS WHILE IN CRUISE. EICAS YAW DAMPER UPPER AND YAW DAMPER UPPER STS MSG(<P>PLACED UPPER YAW DAMPER ON MEL 22-21-01.</P>)
- Difficulty date
- July 7, 2022
- Submitted
- July 11, 2022
- Operation
- Air carrier
- Aircraft
- N747BC
- Make and model
- Boeing 747
- Aircraft serial
- 25879
- Aircraft time
- 53,056 hours
- System (JASC)
- 2216 · Autopilot Trim Servo
- Part
- None
- Condition
- None
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.