# SDR DALA2021042902462

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2021
- Submitted: April 29, 2021
- Operation: Air carrier
- Aircraft: [N314DN](https://openairdocs.org/aircraft/N314DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 7281
- Aircraft time: 12,156 hours, 5,978 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Failed
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021042902462

## Discrepancy

DURING EMERGENCY LIGHT REST EPSU 14WL FAILED. EPSU SHOWS UNIT FAULT WONT RESET. R/R EPSU 14WL PER A321 AMM 33- 51 TEST OK. (LP# 5779584)

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