# SDR CALA2026071417776

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2026
- Submitted: July 15, 2026
- Operation: Air carrier
- Aircraft: [N475UA](https://openairdocs.org/aircraft/N475UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1495
- Aircraft time: 71,203 hours, 31,505 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- Condition: Faulty
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026071417776

## Discrepancy

PROCEDURE - EMERGENCY LIGHT ON CIDS BITE TEST FAULT : EPSU BATTERY EMER R R&R BATTERY OF THE EMERGENCY POWER SUPPLY UNIT (EPSU) IAW AMM 33-51-38 OPS CHECK GOOD PARTS USED:  18-3351-3-0001,QTY :1

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