# SDR UALA2011102105690

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2011
- Submitted: November 4, 2011
- Operation: Air carrier
- Aircraft: [N171UA](https://openairdocs.org/aircraft/N171UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 24322
- Aircraft time: 83,459 hours, 9,948 cycles
- Engine: Pwa PW4056
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1019151
- Part serial: 691
- Condition: No Test
- Location: Cockpit
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011102105690

## Discrepancy

CAPTAIN'S OXYGEN MASK WILL NOT TEST.  REPLACED OXYGEN MASK PER 35-11-18-0401, 35-11-00 PG 506.

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