# SDR USAA2013042400001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2013
- Submitted: April 24, 2013
- Operation: Air carrier
- Aircraft: [N173US](https://openairdocs.org/aircraft/N173US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1481
- Aircraft time: 42,043 hours, 15,351 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 3683
- Condition: Inoperative
- Location: Cabin
- Part time: 15,355 hours, 42,054 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/USAA2013042400001

## Discrepancy

2S CHECK - DURING CABIN EMERGENCY LIGHTING OPERATIONAL TEST, EMERGENCY LIGHTS WERE FOUND INOP ON SEAT POSITIONS 25, 30 AND 34 LEFT SIDE AT PAX CABIN.  PERFORMED TROUBLESHOOTING IAW TSM 31-51-00-810-801-A AND REPLACED EPSU (13WL) IAW AMM 33-51-38-400-001-A AND PERFORMED OPS TEST IAW AMM 33-51-00-710-001-A.  TEST OK.

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