# SDR YENA201802130094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 13, 2018
- Submitted: February 14, 2018
- Operation: Air carrier
- Aircraft: [N968JT](https://openairdocs.org/aircraft/N968JT), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7305
- Aircraft time: 6,394 hours, 1,233 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 143955
- Condition: Failed
- Location: Emergency Light
- Part time: 18,027 hours, 5,102 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/YENA201802130094

## Discrepancy

DURING HEAVY MAINTENANCE, PERFORMING AN OPS CHECK OF THE EMERGENCY LIGHTS, THE EPSU FAILED.  REPLACED THE EPSU IAW AMM 33-51-38-400-001-A, REV 12. OPS CHECKED IAW AMM 33-51-38-740-050-B, REV 12

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