# SDR YENA2023081800959

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2023
- Submitted: August 18, 2023
- Operation: Air carrier
- Aircraft: [N4073J](https://openairdocs.org/aircraft/N4073J), registered now
- Make and model: Airbus A321-271N
- Registry model: [Airbus A321-271N](https://openairdocs.org/model/airbus-a321-271n) (OpenAirDocs)
- Aircraft serial: 11129
- Aircraft time: 1,817 hours, 268 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 767584M
- Part serial: AAA7O24393
- Condition: Failed
- Location: Unknown
- Part time: 1,924 hours, 283 cycles
- Stage of operation: UK
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2023081800959

## Discrepancy

FLT#7, JFK-LHR. (ETOPS) 'DURING PDSC AC GEN ON ECAM ( CLASS II MX MSG - GPCU OR AC GEN ).   REMOVED AND REPLACED  GCU #1 IAW AMM 24-22-34. PERFORMED ENG # 1 AND 2 IDLE RUN PER REF 24-22-34-710051-1. CONFIRMED NO FAULTS. ALL OPS NORMAL. MDDR CLEARED. MX-4 UPDATE. PLACARED REMOVER.

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