# SDR USAA2012040400001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2012
- Submitted: April 4, 2012
- Operation: Air carrier
- Aircraft: [N173US](https://openairdocs.org/aircraft/N173US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1481
- Aircraft time: 38,875 hours, 14,055 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MF100511
- Part serial: 47776
- Condition: Broken
- Location: Cockpit
- Part time: 48,147 hours, 19,278 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012040400001

## Discrepancy

FIRST OFFICER'S OXYGEN MASK QUICK DONNING LEVER BROKE ON DEPLOYMENT,  CAUSING CONTINUOUS FLOW OF OXYGEN.  MAINTENANCE REMOVED AND REPLACED F/O'S OXYGEN MASK.

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