# SDR USAA2012011300007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2012
- Submitted: January 13, 2012
- Operation: Air carrier
- Aircraft: [N539UW](https://openairdocs.org/aircraft/N539UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4082
- Aircraft time: 7,700 hours, 2,854 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 324030
- Condition: Discharged
- Location: Cabin
- 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/USAA2012011300007

## Discrepancy

EMERGENCY LIGHTS ON SEATS AT ROW 21 AND 22 INOPERATIVE.  REPAIRED R2 EXTERIOR LIGHT AND REPLACED BOTH AFT EMERGENCY POWER SUPPLY BATTERY UNITS.

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