What was found
SPRINGS ARE BROKEN IN THE AUXILIARY BRAKE SYSTEM, CAUSING THE UNIT TO BIND AND JAM.PROBABLE CAUSE/IMPROPER HEAT-TREATING, AUSTENITE, FATIGUE AND INCREASED SPRING COIL STRESSES.
- Difficulty date
- December 18, 2000
- Submitted
- January 25, 2001
- Operation
- General aviation
- Make and model
- Boeing 737
- System (JASC)
- 2742 · Stabilizer Actuator
- Part
- Spring
- Part number
- 69778551
- Condition
- Broken
- Location
- Horizontal Stab
- Component
- Hz Stb Trim Act · Boeing
- Component part number
- 65C3475110
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.