# SDR AALA202012039005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2020
- Submitted: December 3, 2020
- Operation: Air carrier
- Aircraft: [N148AN](https://openairdocs.org/aircraft/N148AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6790
- Aircraft time: 16,070 hours, 6,067 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202012039005

## Discrepancy

AIRCRAFT WAS NOT GROUNDED.  EMERGENCY POWER SUPPLY UNIT 11WL FAULTED ON EMERGENCY POWER SUPPLY UNIT BITE TEST.  REMOVED AND REPLACED 11WL EMERGENCY POWER SUPPLY UNIT BATTERY, PER AMM 33-51-38.

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