# SDR CALA2026072618022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2026
- Submitted: July 27, 2026
- Operation: Air carrier
- Aircraft: [N14512](https://openairdocs.org/aircraft/N14512), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11953
- Aircraft time: 6,123 hours, 2,210 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- Condition: Faulted
- Location: Zone 200
- 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/CALA2026072618022

## Discrepancy

EPSU SYSTEM TEST FAULT 10WL FWD L. EPSU 10WL SELF TEST SHOWS BATTERY FAULT.  REMOVED AND REPLACED EPSU BATTERY IAW AMM 33-51-00-710-812-A.  NEW BATTERY TESTED OK, OK FOR SERVICE.

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