# SDR CALA2017041701031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2017
- Submitted: April 17, 2017
- Operation: Air carrier
- Aircraft: [N470UA](https://openairdocs.org/aircraft/N470UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1427
- Aircraft time: 52,376 hours, 22,258 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 4061
- Condition: Faulty
- Location: Cabin
- 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/CALA2017041701031

## Discrepancy

EMERGENCY LIGHT TEST FAILED, MSG "EPSU BATTERY AFT L" DISPLAYED ON CIDS.  REPLACED EPSU PER AMM 33-51-38. EMERGENCY LIGHT TESTED OK PER AMM TASK 33-51-38-400-001-A, MESSAGE CLEAR.

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