# SDR CALA2013092791523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2013
- Submitted: September 27, 2013
- Operation: Air carrier
- Aircraft: N411UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 464
- Aircraft time: 66,032 hours, 24,469 cycles
- Engine: Iae V2527A5
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013092791523

## Discrepancy

FIRST OFFICER`S OXYGEN MASK HAS LEAK & DOESN'T EXPAND FOR PROPER FIT AROUND HEAD.   SWAPPED FIRST OFFICER`S WITH FIRST OBSERVER`S.  FIRST OFFICERS` OPERATIONS CHECKED GOOD. DEFERRED STICKER FIRST OBSERVER`S SEAT INOPERATIVE.  REPLACED FIRST OBSERVER`S MASK IAW MM.

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