# SDR CALA2025030302540

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2025
- Submitted: March 3, 2025
- Operation: Air carrier
- Aircraft: [N827UA](https://openairdocs.org/aircraft/N827UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1022
- Aircraft time: 78,584 hours, 34,260 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 008571
- Condition: No Test
- Location: Zone 200
- Part time: 19,386 hours, 9,767 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025030302540

## Discrepancy

CABIN EMERGENCY LIGHTING BATTERY CAPACITY OPERATIONAL CHECK {A3NB-33-3-6013} - EPSU FWD LH MESSAGE FAILURE DISPLAYED ON TEST. REMOVED AND REPLACED FWD EMERGENCY POWER SUPPLY UNIT AS PER AMM 33-51-38/401. OPERATIONAL TEST GOOD.PARTS USED: 31-3350-9-9001, QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1749360 SN OFF 8571, POWER SUPPLY, P OFF 31-3350-9-9001 8571 ON 31-3350-9-9001 4341

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