- Difficulty date
- April 16, 2022
- Submitted
- April 26, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41734
- Aircraft time
- 33,670 hours, 10,748 cycles
- Part
- Unknown
- Part number
- 305RAA1
- Part serial
- AS05989
- Condition
- Faulty
- Location
- Flight Compartme
- Part time
- 37,485 hours, 12,173 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO THRUST DISENGAGED AND WOULD NOT REENGAGE. GROUNDED - YES. CONFIRMED FAULT, A/T FAULT REVIEW SHOWS NUMEROUS ASM-1 FAULT MSG# 22-31687 "RATE MONITOR". REMOVED & REPLACED ASM-1 REF B737-900 AMM 22-31-91, OPS CK NML REF AMM 22-31-00-710-801. PULLED & RESET 1 TOTAL C/B. ALSO, ACCOMPLISHED DFCS LAND VERIFY TEST (GP 49) REF AMM 22-11-00 AND HGS SYSTEM TEST REF B737-900 SMM 34-36-00, OPS CK NML.