# SDR CALA2026030214143

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2026
- Submitted: March 2, 2026
- Operation: Air carrier
- Aircraft: [N477UA](https://openairdocs.org/aircraft/N477UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1514
- Aircraft time: 68,767 hours, 30,254 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 1069
- Condition: Faulted
- Location: Zone 200
- Part time: 22,752 hours, 11,795 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/CALA2026030214143

## Discrepancy

EMERGENCY LIGHT CHECK GIVES FAULT: EPSU UNIT EMER L.  REMOVED AND REPLACED LC OVERWING EXIT EPSU IAW AMM 33-51-38-000-001-A/400-001-A OPS CHECK NORMAL TEST PASSED, GOOD  TO CONTINUE

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