# SDR AALA202610167734

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2026
- Submitted: October 16, 2026
- Operation: Air carrier
- Aircraft: [N179UW](https://openairdocs.org/aircraft/N179UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1521
- Aircraft time: 80,613 hours, 31,411 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Box
- Condition: Leaking
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202610167734

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO ORD DUE TO THE FLIGHT CREW REPORTING A SLOW CREW OXYGEN LEAK - THE AIRCRAFT LANDED SAFELY AT ORD WITHOUT FURTHER INCIDENT - MAINTENANCE FOUND THE 4TH OCCUPANT 02 FULL MASK STOWAGE BOX LEAKING AND REPLACED IT PER AMM 35-12-10

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