# SDR USAA2013022000005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2013
- Submitted: February 20, 2013
- Operation: Air carrier
- Aircraft: [N103US](https://openairdocs.org/aircraft/N103US), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 861
- Aircraft time: 37,273 hours, 21,730 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Condition: Inoperative
- 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/USAA2013022000005

## Discrepancy

EMERGENCY LIGHT SYSTEM TEST FAILED DUE TO EXTERNAL POWER SUPPLY UNIT (EPSU) INTERNAL LOAD FAULT TASK 33-51-00-710-001A.  RELAMPED CABIN EXIT MARKING AND LOCATION SIGNS AS REQUIRED RESTORING EPSU MEMORIZED INTERNAL LOADS.  CABIN EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECKS SATISFACTORY REFERENCE AIRBUS A/M/M 33-51-00-710-009-A AND 33-51-00-710-001-A.

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