# SDR DALA2026011400337

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2026
- Submitted: January 14, 2026
- Operation: Air carrier
- Aircraft: [N548DN](https://openairdocs.org/aircraft/N548DN), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11620
- Aircraft time: 8,880 hours, 2,090 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Failed
- Location: Zone 200
- 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/DALA2026011400337

## Discrepancy

17WL EPSU FAILED (L/H OVERWING) ROWS 25, 26, 22-17, 15-13, 3, 4 EMERGENCY LIGHTS INOP. CORRECTIVE ACTION: REPLACED 17WL IAW A321 AMM 33-51. OPS CHECK GOOD. (LP 7014872)

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