# SDR CALA2025100609617

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2025
- Submitted: October 6, 2025
- Operation: Air carrier
- Aircraft: [N494UA](https://openairdocs.org/aircraft/N494UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1840
- Aircraft time: 68,382 hours, 30,342 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: No Test
- 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/CALA2025100609617

## Discrepancy

OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY UNITS BY BITE-CHECK (PRE EA2500-03960 AND EA2500-08031, REFERENCE EC2500-04561 FOR A/C 871-884, 888-899, 901-950 ) JOB SET-UP - BITE CK FAILED R/H EPSU BATTERY MESSAGE. REPLACED R/H EPSU PER AMM 33-51-38-400-001. NO HELP.ROTABLE PARTS CHG:TT # 1422751 SN OFF 4294 PN OFF 31-3350-9-900.IPC REFERENCE # DP STATUS UNREADABLE MISSING/UNREADABLE PLATE OPTION WAS SELECTED REPLACED EPSU BATTERY PER AMM 33-51-38-400-002-A OP CK GD.

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