# SDR YENA2026091800809

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2026
- Submitted: September 18, 2026
- Operation: Air carrier
- Aircraft: [N793JB](https://openairdocs.org/aircraft/N793JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 04647
- Aircraft time: 55,592 hours, 19,791 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Failed
- Location: Zone 200
- Part time: 4,398 hours, 1,729 cycles
- Component: Power Supply, Diehl
- Component part number: 321431
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2026091800809

## Discrepancy

DURING HEAVY MAINTENANCE, DURING PERFORM OPERATIONAL OF EPSU BY TEST CHECK IAWAMM33-51-00-710-001 BATTERY12WL FAULT. THE BATTERY MUST BE REPLACED; (RESOLVED ON W/O: 1480444 TASKCARD: NR-00037 ) REFERENCE AEROMAN WO 2026 217/1 NR 414952 REMOVED AND REPLACED BATTERY OF THE EMERGENCY POWER SUPPLY UNIT (EPSU) 12WL IN PASSENGER CABIN IAW  AMM 33-51-38-000-002-A AND AMM 33-51-38-400-002-A  AND (PERFORMED OPERATIONAL CHECK OF THE EPSU THRU BITE CHECK IAW AMM 33-51-00-710-001-A TEST IS OK). TECH M AGUILAR 8605312 QC AE347.

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