# SDR CALA2022102402903

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2022
- Submitted: October 24, 2022
- Operation: Air carrier
- Aircraft: N405UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 452
- Aircraft time: 90,450 hours, 35,144 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: Battery
- Part number: AD321431
- Part serial: 273864
- Condition: None
- Location: 12wl
- Stage of operation: IN
- How discovered: O
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2022102402903

## Discrepancy

EPSU BATTERY (12WL) FAILED. AS NOTED ON LTPR NR#5001187284-0010. EPSU BATTERY (12WL) FAILED ON OPERATIONAL CHECK OF THE EMERGENCY P/N OFF: AD3214-31 S/N OFF:273864 QTY OFF: 1EA WORK RECORDED ON LTPR NR# 5001187284-0010. POWER SUPPLY UNITS BY BITE-CHECK AND REQUIRED REPLACEMENT. P/N ON: AD3214-31 S/N ON:282298 QTY ON: 1 EA WORK ACCOMPLISHED BY 5H0545 AND INSPECTED BY 5H0763. BATTERY REPLACEMENT ON (12WL) PERFORMED IAW AMM: 33-51-38/401 REV. 117. TEST SATISFACTORY.

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