What was found
FLT#1621, LHR-BOS. (ETOPS) L-1 TSI ELEC GEN 1 FAULT-DUE TO ELEC GEN 1 FAULT ON PFR IN LHR & GCU1 SHOWING THE AT FAULT, REMOVED AND REPLACED GCU NR 1 IAW AMM 24-22-34. OPS CHK GOOD. TSI CLOSED. GROUND VERIFICATION C/W PER AMM 24-22-34.
- Difficulty date
- September 16, 2025
- Submitted
- September 17, 2025
- Operation
- Air carrier
- Aircraft
- N4022J
- Make and model
- Airbus A321271NX
- Aircraft serial
- 10303
- Aircraft time
- 15,828 hours, 2,341 cycles
- System (JASC)
- 2421 · AC Generator-Alternator
- Part
- Gcu
- Condition
- Faulted
- Location
- Nr 1
- 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.