# SDR CALA2026050515982

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2026
- Submitted: May 5, 2026
- Operation: Air carrier
- Aircraft: [N484UA](https://openairdocs.org/aircraft/N484UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1609
- Aircraft time: 69,651 hours, 30,761 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulted
- 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/CALA2026050515982

## Discrepancy

DURING CABIN EMERGENCY LIGHTING SYS CHECK, SYSTEM OK LIGHT NEVER CAME ON. EPSU UNIT L MESSAGE FOUND AFT LH EPSU UNIT TO BE FAULTY.  REPLACED BATTERY PACK AND REPERFORMED CABIN EMERGENCY LIGHT SYSTEM CHECK AT PTP. SYS TEST OK.

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