What was found
UNCOMMANDED STAB TRIM DURING CLIMBOUT. NOSE DOWN TRIM WAS FELT. SAM HAD NO FAULT BALLS LATCHED. DETERMINED THE PROBLEM TO LEFT SAM. REPLACED LEFT SAM STABILIZER-TRIM /AILERON LOCKOUT UNIT.
- Difficulty date
- December 23, 2006
- Submitted
- January 2, 2007
- Operation
- Air carrier
- Aircraft
- N520UA
- Make and model
- Boeing 757222
- Aircraft serial
- 24890
- Aircraft time
- 53,988 hours, 20,257 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 2740 · Stabilizer Control System
- Part
- Trim System
- Condition
- Malfunctioned
- Location
- Stabilizer
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.