# SDR YENA2020122100612

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2020
- Submitted: December 22, 2020
- Operation: Air carrier
- Aircraft: [N942JB](https://openairdocs.org/aircraft/N942JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6279
- Aircraft time: 24,125 hours, 4,641 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 811077
- Condition: Failed
- Location: Emergency Lights
- Part time: 8,770 hours, 3,234 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/YENA2020122100612

## Discrepancy

DURING RETURN TO SERVICE CHECK, EPSU BATTERY AT 12WL FAILED TEST.  REMOVED AND REPLACED EPSU BATT (12WL) R3 DOOR, IAW AMM 33-51-38.  OPERATIONS CHECK GOOD.

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