# SDR YENA2022112101143

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2022
- Submitted: November 22, 2022
- Operation: Air carrier
- Aircraft: [N942JB](https://openairdocs.org/aircraft/N942JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 06279
- Aircraft time: 30,838 hours, 5,986 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: No Test
- Location: Emergency Light
- 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/YENA2022112101143

## Discrepancy

DURING HEAVY MAINTENANCE: DURING THE OPERATIONAL TEST OF THE PASSENGER CREW DOOR EMERGENCY LIGHT SYSTEM SHOW A FAULT MESSAGE BAT/EPSU(10WL) IN THE PASSENGER CABIN; REF  NR 2022-631495 WO 2022 410/1 REMOVED AND REPLACED BATTERY OF EPSU FIN 10WL IN PASSENGER CABIN IAW AMM 33-51-38-000-002-A AND AMM  33-51-38-400-002-A. AND PERFORMED AN OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY UNIT BY BITE - CHECK  IAW AMM 33-51-00-710-001. AND THE TEST IS GOOD.

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