# SDR CALA2026010212579

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2025
- Submitted: January 2, 2026
- Operation: Air carrier
- Aircraft: [N498UA](https://openairdocs.org/aircraft/N498UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1865
- Aircraft time: 66,612 hours, 29,327 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- 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/CALA2026010212579

## Discrepancy

DURING CABIN EMERG LIGHT TEST MESSAGE, EPSU BATTERY EMER RT, DISPLAYED ON CIDS SCREEN. PERFORMED BATTERY TEST AT BATTERY REF MM 33-51-00. CONFIRMED BATTERY FAULT. REMOVED EPSU BATTERY AT RT EMERGENCY EXIT ROW REF MM 33-51-38. NEW BATTERY ORDERED, COMING FROM ORD TERMINAL. PERFORMED ELOTO REPLACED BATTERY IAW MM 33-51-38. OPS CHECK GOOD. OKAY TO CONTINUE.

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