# SDR CALA2025072806984

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2025
- Submitted: July 28, 2025
- Operation: Air carrier
- Aircraft: [N466UA](https://openairdocs.org/aircraft/N466UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1343
- Aircraft time: 75,555 hours, 31,236 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 4105
- Condition: No Test
- Location: Zone 200
- Part time: 779,467 hours, 733,663 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/CALA2025072806984

## Discrepancy

PROCEDURE - TEST FAILED WITH MSG "EPSU COMM FWD L" SEE PIC ABOVE SHOULD READ EMERGENCY LIGHTING TEST PROCEDURE- PERFORMED TSM 33-51-00, FOUND EPSU COMM FWD LEFT FAULT. TESTED EPSU 10WL REF STEP 4B-1A NO EPSU LED'S CAME ON.  REPLACED EPSU 10WL REF AMM 33-51-38. OPS CHECK GOOD.

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