# SDR YENA2023041900407

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2023
- Submitted: April 19, 2023
- Operation: Air carrier
- Aircraft: [N929JB](https://openairdocs.org/aircraft/N929JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 06031
- Aircraft time: 36,186 hours, 7,022 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 909883
- Condition: Failed
- Location: 15wl-Batt
- Part time: 1,497 hours, 295 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2023041900407

## Discrepancy

FLT#924, LAX-JFK.'EPSU FIN 15WL FAILED DURING OPS CHECK OF EMERGENCY LTS; REPLACED EPSU FIN 15WL PER AMM 33-52-38, OPS CHECK .'

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