# SDR AALA2024051609862

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2024
- Submitted: May 16, 2024
- Operation: Air carrier
- Aircraft: [N521UW](https://openairdocs.org/aircraft/N521UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3944
- Aircraft time: 48,370 hours, 18,354 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Slide
- Part number: D30664513
- Part serial: M23093
- Condition: Warning Message
- Location: Zone 800 - Doors
- Part time: 10,031 hours, 4,497 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2024051609862

## Discrepancy

AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT 10WL FAULT MESSAGE DISPLAYED DURING SYSTEM TEST.  MAINTENANCE REPLACED THE R1 DOOR SLIDE AND ACCCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE EMEMRGENCY L;IGHTING SYSTEM WITH NO FAULTS NOTED.

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