# SDR GTIA2025042238877

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2025
- Submitted: April 22, 2025
- Operation: Air carrier
- Aircraft: [N924NK](https://openairdocs.org/aircraft/N924NK), registered now
- Make and model: Airbus A320-271N
- Registry model: [Airbus A320-271N](https://openairdocs.org/model/airbus-a320-271n) (OpenAirDocs)
- Aircraft serial: 9405
- Aircraft time: 16,945 hours, 7,068 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32146210
- Part serial: 170599
- Condition: Fault Message
- Location: Zone 200
- Part time: 13,160 hours, 5,508 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA2025042238877

## Discrepancy

REF TASK CARD 256241-03-1-NKS  DURING OPS TEST OF EMER LIGHT ON MCDU MSG  " EPPSU (10WL) FWD L" APPEARS.-FIN 10WL R/R EPSU PWER SUP SYS OPS GOOD IAW AMM 33-51-38.

---
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.