# SDR YENA201702220112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2017
- Submitted: March 9, 2017
- 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: 1,924 hours, 372 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 153187
- Condition: Failed
- Location: Emergency Lights
- Part time: 1,924 hours, 372 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/YENA201702220112

## Discrepancy

DURING ROUTINE MAINTENANCE, DURING WEEKLY CHECK FOUND L3 & R3 EMERGENCY LIGHTS EXIT MARKER LIGHTS ON DOORS INOPERATIVE.  THE ESPU (12WL) SHOWING UNIT FAULT DURING BITE TEST.  REMOVED & REPLACED THE ESPU (12WL) IAW AMM 33-51-38. OPS CHECKED GOOD.

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