# SDR YENA2024080501070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 2024
- Submitted: September 11, 2024
- Operation: Air carrier
- Aircraft: [N4064J](https://openairdocs.org/aircraft/N4064J), registered now
- Make and model: Airbus A321-271N
- Registry model: [Airbus A321-271N](https://openairdocs.org/model/airbus-a321-271n) (OpenAirDocs)
- Aircraft serial: 10861
- Aircraft time: 7,626 hours, 1,120 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 767584M
- Part serial: AAAY023357
- Condition: Failed
- Location: Zone 400
- Part time: 7,715 hours, 1,133 cycles
- 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/YENA2024080501070

## Discrepancy

FLT#43, JFK-LGW. (ETOPS) 'CLASS 2 MESSAGE: AC GEN ( CLASS II MX MSG - GPCU OR AC GEN ); REMOVED AND REPLACED GCU # 2 (1XU2) IAW AMM 24-22-34. OPS CHECK NORMAL. THIS CLEARS MDDR 555869. NO FAULTS OR MESSAGES NOTED AT THIS TIME. MX-4 UPDATED, PLACARD REMOVED.'

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.