# SDR AALA202108308888

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: August 30, 2021
- Operation: Air carrier
- Aircraft: [N552UW](https://openairdocs.org/aircraft/N552UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4957
- Aircraft time: 31,780 hours, 11,917 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Slide
- Part number: D30665513
- Part serial: M22562
- Condition: No Test
- Location: Zone 800
- Part time: 657 hours, 271 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/AALA202108308888

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE PERFORMING EMERGENCY POWER SUPPLY UNIT BATTERY TEST PER JOB CARD 26L00005005, ESCAPE SLIDE LIGHT 13WL AT DOOR 4L FOUND FAULTED VIA CLASS 1 MESSAGE. REMOVED AND REPLACED L4 DOOR ESCAPE SLIDE PER JOB CARD 26L00025010.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.