# SDR GTIA2025081139043

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2025
- Submitted: August 11, 2025
- Operation: Air carrier
- Aircraft: [N974NK](https://openairdocs.org/aircraft/N974NK), registered now
- Make and model: Airbus A320-271N
- Registry model: [Airbus A320-271N](https://openairdocs.org/model/airbus-a320-271n) (OpenAirDocs)
- Aircraft serial: 11270
- Aircraft time: 9,377 hours, 4,112 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 181363
- Condition: Faulted
- Location: Zone 200
- Part time: 9,381 hours, 4,113 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/GTIA2025081139043

## Discrepancy

PERFORMED EPSU SYS TEST FOR SERVICE CHECK, FOUND 12WL FAULTY.  PRECAUTIONARY R&R OF 12WL EPSU IAW AMM 33-51-38.

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