# SDR DALA2023060204432

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2023
- Submitted: June 2, 2023
- Operation: Air carrier
- Aircraft: [N124DX](https://openairdocs.org/aircraft/N124DX), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 10251
- Aircraft time: 5,585 hours, 2,415 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Unknown
- Part number: 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/DALA2023060204432

## Discrepancy

MULTIPLE EMERGENCY LIGHTS INOP IN AFT CABIN. PERRORMED EPSU BITE CHECK IAW A321 AMM 33-51. FAULTS: "EPSU ( 11WL) EXT L". REMOVED EPSU 11WL IAW A321 AMM 33-51-38 (MS 778522 ). INSTALLED A NEW EPSU AT 11WL PER A321 AMM 33-51-38 OPS CHECK GOOD. EPSU BITE CHECK PASSED NO PERFORMED. (LP# 4178378)

---
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.