# SDR DALA2026072804379

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: July 29, 2026
- Operation: Air carrier
- Aircraft: [N355NB](https://openairdocs.org/aircraft/N355NB), registered now
- Make and model: Airbus A319-114
- Registry model: [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114) (OpenAirDocs)
- Aircraft serial: 1839
- Aircraft time: 63,683 hours, 32,864 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 77233500
- Part serial: 4907
- Condition: Faulted
- Location: Zone 200
- Part time: 48,659 hours, 25,028 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/DALA2026072804379

## Discrepancy

DURING WC 3351-2991 FOUND EMERGENCY RT EPSU FAULTED.  R & R EMERGENCY RT EPSU IAW AMM 33-51, OPS TEST OK. (LP: 8756474, AIRCRAFT WAS GROUNDED)

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