# SDR AALA201509099004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 8, 2015
- Submitted: September 13, 2015
- Operation: Air carrier
- Aircraft: [N161UW](https://openairdocs.org/aircraft/N161UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1403
- Aircraft time: 49,798 hours, 18,598 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145510
- Part serial: 2267
- Condition: Failed
- Location: Cabin
- Part time: 48,856 hours, 18,285 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/AALA201509099004

## Discrepancy

EMERGENCY POWER SUPPLY UNIT 12WL WOULD NOT TEST.  R & R EPSU 12WL.  CHECKED OK IAW AMM 31-51-38.

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