# SDR YENA201703180202

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 18, 2017
- Submitted: March 21, 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: 2,205 hours, 427 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 155291
- Condition: No Test
- Location: Emergency Lights
- Part time: 71 hours, 14 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/YENA201703180202

## Discrepancy

DURING ROUTINE MAINTENANCE, L2 & R2, L4 & R4 LOWER EMERGENCY EXIT SIGNS WILL NOT ILLUMINATE.  FOUND EPSU FAULTED.  R & R IAW AMM 33-51-38. CHECKED NORMAL.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.