# SDR 2006UALA02320

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 6, 2006
- Submitted: December 13, 2006
- Operation: Air carrier
- Aircraft: [N809UA](https://openairdocs.org/aircraft/N809UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 825
- Aircraft time: 30,548 hours, 11,559 cycles
- Engine: Iae V2522A5
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Failed
- Location: Emergency Lights
- 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/2006UALA02320

## Discrepancy

3SVC EMERGENCY LIGHT TEST FAILED *ATA 33-51-38 EPSU EXT LOAD EMERGENCY L*.  DURING TROUBLESHOOTING FOUND EPSU AT LEFT OVERWING EXIT WOULD NOT TEST USING MEMBRANE SWITCH ON EPSU.   REPLACED EPSU AND BATTERY. TESTED OKAY.

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