# SDR AALA202501194112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2025
- Submitted: January 19, 2025
- Operation: Air carrier
- Aircraft: [N757UW](https://openairdocs.org/aircraft/N757UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1342
- Aircraft time: 58,316 hours, 39,551 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 321454
- Part serial: 2986
- Condition: No Test
- Location: Zone 200
- Part time: 83,854 hours, 38,505 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/AALA202501194112

## Discrepancy

AIRCRAFT WAS GROUNDED: EPSU BITE TEST FAILED. FAULT SHOWED 33-51-38, EPSU UNIT EMER R. MAINTENANCE REPLACED EPSU 12WL IAW AMM 33-51-38

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