# SDR YENA2023060500573

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2023
- Submitted: June 5, 2023
- Operation: Air carrier
- Aircraft: [N956JT](https://openairdocs.org/aircraft/N956JT), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 06791
- Aircraft time: 27,515 hours, 8,862 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 873433
- Condition: No Test
- Location: 13wl-Batt
- Part time: 5,900 hours, 2,041 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2023060500573

## Discrepancy

FLT#2752, SJU-TPA. 'EMERGENCY POWER SUPPLY UNIT (13WL) FAILED SELF-TEST; REPLACED EPSU BATTERY IAW AMM 33-51-38.

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