- Difficulty date
- July 14, 2010
- Submitted
- July 16, 2010
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35683
- Aircraft time
- 10,844 hours, 3,287 cycles
- Part
- Servo
- Part number
- 305RAA1
- Part serial
- AS05016
- Condition
- Inoperative
- Location
- Autothrottle Sys
- Part time
- 10,846 hours, 3,288 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLES WILL NOT STAY ENGAGED. NR 1 THROTTLE MOVES NR 2 THROTTLE DOESN’T MOVE CAUSING SPLIT AND AUTOTHROTTLES TO DISENGAGE. FFR SHOWS NUMEROUS ASM2 FAULTS (MSG 22 31688 SPD RATE MON). ASM2 FAILED A/T BITE INOP. REMOVED & REPLACED ASM2 REF AMM22 31 91, OPS CHECK NORMAL.