# SDR UALA2010070702421

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2010
- Submitted: July 9, 2010
- Operation: Air carrier
- Aircraft: [N479UA](https://openairdocs.org/aircraft/N479UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1538
- Aircraft time: 29,199 hours, 13,009 cycles
- Engine: Iae V2527A5
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 321454
- Part serial: 3963
- Condition: Malfunctioned
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010070702421

## Discrepancy

CABIN EMERGENCY EXIT LIGHT TEST GIVES 'EPSU INTERNAL LOAD FWD LEFT' FAULT.  REPLACED BATTERY AND POWER SUPPLY.  SYSTEM TESTS OKAY.

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