# SDR USAA2011093000033

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2011
- Submitted: September 30, 2011
- Operation: Air carrier
- Aircraft: N633AW
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 82
- Aircraft time: 69,785 hours, 31,212 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 321454
- Part serial: 6945
- Condition: Inoperative
- Location: Cabin
- Part time: 44,474 hours, 18,522 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/USAA2011093000033

## Discrepancy

"COMM EMER R FAULT" ON EMERGENCY LIGHT TEST PER WEEKLY.  REMOVED AND REPLACED CABIN R EMERGENCY POWER SUPPLY UNIT (EPSU) AND BATTERY PER AIRBUS MAINTENANCE MANUAL 33-51-38 PB 401.  OPS CHECKED GOOD.

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