# SDR AALA202512100363

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2025
- Submitted: December 10, 2025
- Operation: Air carrier
- Aircraft: [N891NN](https://openairdocs.org/aircraft/N891NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33315
- Aircraft time: 40,145 hours, 17,368 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Condition: Unwanted Deploy
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202512100363

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: O2 MASKS OVER ROW 19 SEATS ABC DEPLOYED AND EXPANDED OXYGEN. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MIA. REPLACED OXYGEN GENERATOR. PER MM 35-22-11.

---
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.