# SDR USAA2013040400004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2013
- Submitted: April 4, 2013
- Operation: Air carrier
- Aircraft: [N179UW](https://openairdocs.org/aircraft/N179UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1521
- Aircraft time: 41,319 hours, 15,033 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 3834
- Condition: Faulty
- Location: Cabin
- Part time: 41,319 hours, 15,033 cycles
- Stage of operation: UK
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2013040400004

## Discrepancy

WHILE TESTING EMERGENCY LIGHTING SYSTEM.  RECEIVED EMERGENCY POWER SUPPLY UNIT FAULT.  REMOVED AND REPLACED THE EMERGENCY POWER SUPPLY UNIT, IAW AIRBUS MAINTENANCE MANUAL 33-51-38-000-001-A.

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