- Difficulty date
- July 18, 2025
- Submitted
- July 21, 2025
- Operation
- Air carrier
- Make and model
- Airbus A321271NX
- Aircraft serial
- 11604
- Aircraft time
- 6,363 hours, 984 cycles
- Part
- Fcu
- Part number
- 707223652
- Part serial
- CUC23603
- Condition
- Failed
- Location
- Zone 100
- Part time
- 6,656 hours, 6,861 cycles
- Stage of operation
- CR
- 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
FLT#1333, BOS-SFO. (ETOPS) APU FAILED TO START IAW A49-00-01A. 3 START ATTEMPTS MADE OAT - 48 FL 360 ( APU SYSTEM A321NEO ETOPS ); REMOVED AND REPLACED APU FCU IRT AMM 49-32-11. OPS CHK SATISFACTORY. THIS CLEARS MDDR #588838. MCC NOTIFIED. MX-4 UPDATED. PLACARD REMOVED.