# SDR AALA202506197520

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2025
- Submitted: June 19, 2025
- Operation: Air carrier
- Aircraft: [N163US](https://openairdocs.org/aircraft/N163US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1417
- Aircraft time: 76,514 hours, 29,837 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Relay
- Part number: E2101427B
- Condition: Faulted
- Location: Zone 100
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202506197520

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: 1L DOOR NOT SHOWING ARMED ON DOOR/OXY PAGE WHEN FLIGHT ATTENDANT REPORTS IT IS ARMED. MAINTENANCE ACCOMPLISHED TSM 52-11-00-810-804-A AND WAS UNABLE TO DUPLICATE THE ISSUE AND REPLACED THE POWER SUPPLY SWITCH OVER RELAY  (12WN) PER ASM 52-73-01 DUE TO REPEAT WRITEUPS.

---
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.