# SDR CALA2019112542055

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2019
- Submitted: November 25, 2019
- Operation: Air carrier
- Aircraft: [N453UA](https://openairdocs.org/aircraft/N453UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1001
- Aircraft time: 67,075 hours, 27,631 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: AD321431
- Condition: Inoperative
- Location: Emergency Lights
- 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/CALA2019112542055

## Discrepancy

AAR N/R S/N 9304353.(A3NB-33-6012) L-58-NO DOT, THE EMERGENCY LI GHT TEST FOR THE CIDS FAILS WITH THE MESSAGE"EPSU BATTERY AFT L? ATA33-51-38 REMOVED AND REPLACED EPSU BATTERY AFT L IAW A320 AMM 33-51-38-40 0-002-A. OPS TEST ACCOMPLISHED ON CUST CARD 18-3351-1-7907 SEQ. 464 IDT

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