# SDR CALA2025081107573

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2025
- Submitted: August 11, 2025
- Operation: Air carrier
- Aircraft: [N492UA](https://openairdocs.org/aircraft/N492UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1755
- Aircraft time: 66,737 hours, 29,112 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: AD321431
- Condition: Inoperative
- 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/CALA2025081107573

## Discrepancy

DURING TEST FOUND ERROR MSG "EPSU BATTERY EMER L" ATA 33-51-38 SEE PIC REMOVED AND REPLACED LEFT OVERWING EMERGECNY EXIT LIGHT POWER SUPPLY BATTERY REF AMM 33-51-38/401. OPS CHECK GOOD, BITE TEST PASSES WITH A GREEN SYS OK LIGHT AND NO FAULTS.

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