# SDR YENA2025061600607

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2025
- Submitted: June 16, 2025
- Operation: Air carrier
- Aircraft: [N4080J](https://openairdocs.org/aircraft/N4080J), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11861
- Aircraft time: 4,517 hours, 681 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 1718201
- Part serial: AAPT000547
- Condition: Faulted
- Location: Nr 1
- Stage of operation: IN
- 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/YENA2025061600607

## Discrepancy

FLT#31, BOS-AMS. (ETOPS) MX AC GEN CLASS II MESSAGE DEISPLAYED ( CLASS II MX MSG - GPCU OR AC GEN ).  REMOVED AND REPLACED GCU 1 PER AMM 24-22-34. BITE TEST PASS NO PRESENT AC GEN FAULT. MX-4 UPDATED MCC NOTIFIED.

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