# SDR AALA202604216808

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2026
- Submitted: April 21, 2026
- Operation: Air carrier
- Aircraft: [N544UW](https://openairdocs.org/aircraft/N544UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4847
- Aircraft time: 46,291 hours, 18,648 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Deu
- Part number: Z043H000351A
- Part serial: 043H00042589
- Condition: Faulted
- Location: Zone 800
- Part time: 21,978 hours, 6,491 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604216808

## Discrepancy

AIRCRAFT WAS GROUNDED: DOOR L3 INDICATES CHECK SLIDE PRESSURE. MAINTENANCE REPLACED THE DECODER / ENCODER UNIT B 300RH6 (DEU) AS A PRECAUTIONARY MEASURE PER AMM 23-73-47. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.

---
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.