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B737-900 first officer reported his oxygen mask malfunctioned in flight and was replaced with the observer's mask.
| Attributes | |
| ACN | 1293768 |
| Time | |
| Date | 201509 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
As I was storing my oxygen mask prior to our descent; the plastic O2 supply fitting to the regulator snapped in half making the mask inoperative. We decided to replace the mask with the second observer oxygen mask vs descending due to a line of thunderstorms below us. Per the captain's directions; I disconnected the first officer's oxygen and replaced it with the observer's mask. I checked the mask and it checked out fine. We proceeded without any further problems. We then entered the discrepancy in the log book and informed maintenance.
Original NASA ASRS Text
Title: B737-900 FO reported his oxygen mask malfunctioned in flight and was replaced with the observer's mask.
Narrative: As I was storing my oxygen mask prior to our descent; the plastic O2 supply fitting to the regulator snapped in half making the mask inoperative. We decided to replace the mask with the second observer oxygen mask vs descending due to a line of thunderstorms below us. Per the Captain's directions; I disconnected the first officer's oxygen and replaced it with the observer's mask. I checked the mask and it checked out fine. We proceeded without any further problems. We then entered the discrepancy in the log book and informed maintenance.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.