# SDR DALA2022052003462

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 18, 2022
- Submitted: May 20, 2022
- Operation: Air carrier
- Aircraft: [N312DN](https://openairdocs.org/aircraft/N312DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 7364
- Aircraft time: 14,214 hours, 6,939 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: None
- Condition: None
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2022052003462

## Discrepancy

WHILE WORKING SERVICE CHECK FOUND EPCU 13WL SHOWS UNIT FAULT.R AND R EPCU UPON TEST UNIT FAIL LIGHT ILUMMINSTED IAW A321 AMM 33-51-00-710-001-A PULLED H6, H05 AND V07 FOLOWED FIM 33-5100- 810-836-A ALL PINS SHORT TO GROUND ARE GOOD. ORDERED ANOTNE EPSU WIP 818435. REPLACED 13WL OPS CHECK IS GOOD PER A321 AMM 33-51 POWER SUPPLY, E OFF 34-3351-9-0001 02247 ON 33-3351-9-0002 51163. (LP# 2240640)

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