# SDR AALA202509298140

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2025
- Submitted: September 29, 2025
- Operation: Air carrier
- Aircraft: [N958XV](https://openairdocs.org/aircraft/N958XV), registered now
- Make and model: Airbus A321-253N
- Registry model: [Airbus A321-253N](https://openairdocs.org/model/airbus-a321-253n) (OpenAirDocs)
- Aircraft serial: 8819
- Aircraft time: 18,266 hours, 4,948 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulty
- Location: Zone 200
- 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/AALA202509298140

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: EPSU SYSTEM TEST SHOWS, BAT/EPSU (12WR) FAULT. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY BATTERY AT THE 12WL POSITION IAW AMM 33-51-38.

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