# SDR CA990630048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Boeing 727217
- Engine: Pwa JT8D17
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: O2 Mask
- Part number: 11442729
- Condition: Failed
- Location: Cockpit
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990630048

## Discrepancy

(CAN) FIRST OFFICER'S OXYGEN MASK WILL NOT ALLOW OCCUPANT TO EXHALE THROUGH THE MASK.  MASK REMOVED AND REPAIRED PER MM AND REINSTALLED.

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