# SDR UIEA2021091001998

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2021
- Submitted: September 14, 2021
- Operation: Air carrier
- Aircraft: [N1399A](https://openairdocs.org/aircraft/N1399A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27959
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1008109
- Part serial: 47457
- Condition: Failed
- Location: Captain'S
- Stage of operation: TX
- 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/UIEA2021091001998

## Discrepancy

CAPT O2 MASK 100% SWITCH STICKING. MASK EXTREMELY HARD TO BREATH THROUGH. NEEDS TO BE REPLACED.(<P>REMOVED AND REPLACED CAPT O2 MASK IAW AMM 35-11-51. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED.</P>)

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