# SDR USAA2012081300021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2012
- Submitted: August 13, 2012
- Operation: Air carrier
- Aircraft: [N552UW](https://openairdocs.org/aircraft/N552UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4957
- Aircraft time: 2,597 hours, 865 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MF20534
- Condition: Out Of Adjust
- 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/USAA2012081300021

## Discrepancy

FIRST OFFICER'S OXYGEN MASK EMERGENCY PRESSURE SELECTOR WILL NOT TEST - NO AIR FLOW.  MAINTENANCE ADJUSTED MASK IN BOX.  PRESS-TO-TEST WORKS NORMAL WITH AIRFLOW AND TEST INDICATION FUNCTIONS NORMAL.

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