- Difficulty date
- June 21, 2017
- Submitted
- June 23, 2017
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41734
- Aircraft time
- 16,880 hours, 5,553 cycles
- Part
- Servo
- Part number
- 305RAA1
- Part serial
- AS05905
- Condition
- Failed
- Location
- Autothrottle Sys
- Part time
- 17,555 hours, 5,787 cycles
- Stage of operation
- NR
- 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
AUTOTHROTTLE WILL NOT STAY CONNECTED. ACFT GROUNDED. CONFIRMED FAULT, AUTOTHROTTLE INOPERATIVE. CURRENT BITE & FAULT HISTORY SHOW ASM-1 FAULT MESSAGE 22-31687. REMOVED & REPLACED THE AUTOTHROTTLE ASM-1 IAW AMM 22-31-91. GROUND FUNCTIONAL CHECK NORMAL IAW AMM 22-31-00-710-802.