# SDR YENA201711210950

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2017
- Submitted: November 21, 2017
- Operation: Air carrier
- Aircraft: [N976JT](https://openairdocs.org/aircraft/N976JT), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7529
- Aircraft time: 3,497 hours, 677 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32146210
- Part serial: 010993
- Condition: Failed
- Location: Emergency Lights
- Part time: 24,544 hours, 8,111 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/YENA201711210950

## Discrepancy

DURING A WEEKLY TEST THE EPSU SYS TEST FAILED,  R & R THE EPSU IAW AMM 33-51-38 . OPS CHECKED OK.

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