# SDR DALA2025030701784

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2025
- Submitted: March 7, 2025
- Operation: Air carrier
- Aircraft: [N509DN](https://openairdocs.org/aircraft/N509DN), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0199
- Aircraft time: 31,057 hours, 3,009 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulted
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025030701784

## Discrepancy

AIORCRAFT 3509, DISPATCH MSG CABIN EMER EXIT LT. CORRECTIVE ACTION: REPLACED EPSU (102WL2, 102WL4) PER A350 AMM 33-51 OPS CHK GOOD. (LP 6876890)

---
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.