# SDR YENA2023051200512

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2023
- Submitted: May 12, 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: 612 hours, 91 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknkown
- Stage of operation: TX
- 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/YENA2023051200512

## Discrepancy

FLT#1107, JFK-LHR. (ETOPS)' CLASS II MAINTENANCE MESSAGE AC GEN DISPLAYED ON POWER UP ( CLASS II MX MSG - GPCU OR AC GEN ).  PERFORMED OPS TEST OF GCU 1 AND GCU 2 IAW AMM 24-22-34. THE OPS CHECK IS GOOD. NO MSG DISPLAYED AT THIS TIME. NO PREVIOUS HISTORY. MDDR CLEARED. 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.