# SDR AALA202604207829

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2026
- Submitted: April 20, 2026
- Operation: Air carrier
- Aircraft: [N442AN](https://openairdocs.org/aircraft/N442AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 10711
- Aircraft time: 17,108 hours, 4,613 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Slide Raft
- Part number: D30665515
- Part serial: M11202
- Condition: No Test
- Location: Zone 800
- Part time: 31,698 hours, 10,762 cycles
- 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/AALA202604207829

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: FAULT MESSAGE FOR EMERGENCY POWER SUPPLY UNIT 13WL DISPLAYED DURING SYSTEM TEST. MAINTENANCE ISOLATED THE SOURCE OF THE FAULT TO THE R4 DOOR SLIDE RAFT ASSEMBLY AND REPLACED IT PER JOB CARD 26L00025011. A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM WAS ACCOMPLISHED WITH NO FAULTS NOTED.

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