# SDR GTIA2023101037530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2023
- Submitted: October 11, 2023
- Operation: Air carrier
- Aircraft: [N665NK](https://openairdocs.org/aircraft/N665NK), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7045
- Aircraft time: 25,646 hours, 11,223 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32146210
- Part serial: 151752
- Condition: Faulted
- Location: 13wl
- Part time: 25,646 hours, 11,223 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/GTIA2023101037530

## Discrepancy

WHILE PERFORMING EPSU BITE TEST DURING SVC. CHECK, FOUND EPSU 13WL FAULTING-R/R EPSU 13WL IAW AMM 33-51-38. PERFORMED BITE TEST, NO FAULT NOTED AT THIS TIME.

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