# SDR DALA2023051803966

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2023
- Submitted: May 18, 2023
- Operation: Air carrier
- Aircraft: [N358DN](https://openairdocs.org/aircraft/N358DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 8316
- Aircraft time: 13,958 hours, 6,055 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- 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/DALA2023051803966

## Discrepancy

DURING SERVICE CHECK. FOUND EPSU (11WL) EXT L AND BATT/EPSU ( 12WL) EXT R CLASS 1 FAULTS. REMOVED AND REPLACED EPSU (11WL) AND BATTERY PER A321 AMM 33-51. REMOVED AND REPLACED EPSU BATTERY (12WL) PER A321 AMM 33-51. OPS GOOD. POWER SUPPLY, E OFF 34-3351-9-0001 59416 ON 33-3351-9-0002 52333. (LP# 9345292)

---
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.