# SDR USAA2012082400013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2012
- Submitted: August 24, 2012
- Operation: Air carrier
- Aircraft: [N534UW](https://openairdocs.org/aircraft/N534UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3989
- Aircraft time: 12,079 hours, 3,929 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Stowage Box
- Part number: MXP80111
- Condition: Defective
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012082400013

## Discrepancy

CAPTAIN'S OXYGEN MASK INTERMITTENTLY WILL NOT TEST - RED EMERGENCY BUTTON APPEARS WORN OUT.  REMOVED AND REPLACED CREW OXYGEN MASK STORAGE BOX IAW AIRBUS MAINTENANCE MANUAL 35-12-41.

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