# SDR AALA201611119001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2016
- Submitted: November 11, 2016
- Operation: Air carrier
- Aircraft: [N540UW](https://openairdocs.org/aircraft/N540UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4107
- Aircraft time: 22,912 hours, 9,053 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: Faulty
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201611119001

## Discrepancy

AIRCRAFT WAS NOT GROUNDED. EMERGENCY LIGHT CHECK REVEALED BATTERY EMERGENCY POWER SUPPLY UNIT (12WL) ERROR MESSAGE. REPLACED BATTERY PER AMM 35-51-38 AND ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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