# SDR AALA201512019002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2015
- Submitted: December 1, 2015
- Operation: Air carrier
- Aircraft: [N536UW](https://openairdocs.org/aircraft/N536UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4025
- Aircraft time: 20,219 hours, 7,990 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- 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/AALA201512019002

## Discrepancy

EMERGENCY POWER SUPPLY UNIT 14WL, SHOWS BATTERY FAULT.  REPLACED EPSU UNIT 14WL BATTERY PACK & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK IAW AMM 33-31-38.

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