What was found
FLT#834, SFO-BOS. (ETOPS) APU FAILED TO START IAW A49-00-01A 2 START ATTEMPS MADE OAT- 44 FL350; REMOVED AND REPLACED APU IGNITION EXCITER REF AMM 49-41-38 OPS CHECK GOOD.
- Difficulty date
- July 21, 2025
- Submitted
- July 23, 2025
- Operation
- Air carrier
- Aircraft
- N4077J
- Make and model
- Airbus A321271NX
- Aircraft serial
- 11604
- Aircraft time
- 6,379 hours, 987 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Apu
- Condition
- Malfunctioned
- Location
- Zone 100
- 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.