# SDR AALA202110149549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2021
- Submitted: October 14, 2021
- Operation: Air carrier
- Aircraft: [N535UW](https://openairdocs.org/aircraft/N535UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3993
- Aircraft time: 42,002 hours, 15,175 cycles
- System (JASC): [2565 · Escape Slide](https://openairdocs.org/jasc/2565)
- Part: Slide
- Part number: D30665513
- Part serial: M24139
- Condition: None
- Location: Zone 800 - Doors
- Part time: 827 hours, 330 cycles
- 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/AALA202110149549

## Discrepancy

AIRCRAFT WAS GROUNDED: DURING EMERGENCY POWER SUPPLY UNIT TEST FOUND MULTIPLE FAULTS ON 13WL BATTERY PACK. FOUND 4R DOOR SLIDE LIGHTING CIRCUIT AT FAULT. REMOVED AND REPLACED 4R DOOR SLIDE ASSEMBLY.

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