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B737 captain reported an anomaly with the cockpit oxygen masks that did not seal properly.
| Attributes | |
| ACN | 1684026 |
| Time | |
| Date | 201909 |
| Place | |
| Locale Reference | MGGT.Airport |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 214 Flight Crew Type 6068 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
I pulled the oxygen mask out to wear during bathroom breaks. I found that the beige/orange oxygen mask goggle portion did not seal up at the top of my face with very large gaps. It was written up in gua.yesterday; the first officer pulled the oxygen mask to wear during bathroom break and found a plastic rivet missing on the front of mask. It was written up [at the destination airport]. On arrival I stepped off the aircraft to see a mechanic on the jetway with a new beige/orange oxygen mask that I had previously known not to seal up around my face. I asked I thought we were taking these off the aircraft because they don't seal up and he said he didn't know but this one came from the parts room at the hangar. Maybe it's possible I do not understand the engineering of these new oxygen masks and air is expelled out these large gaps to prevent smoke from entering; or they fit perfectly on square faced person; or they are poorly designed masks. But I do think we need to take a closer look please.
Original NASA ASRS Text
Title: B737 Captain reported an anomaly with the cockpit oxygen masks that did not seal properly.
Narrative: I pulled the oxygen mask out to wear during bathroom breaks. I found that the beige/orange oxygen mask goggle portion did not seal up at the top of my face with very large gaps. It was written up in GUA.Yesterday; the First Officer pulled the oxygen mask to wear during bathroom break and found a plastic rivet missing on the front of mask. It was written up [at the destination airport]. On arrival I stepped off the aircraft to see a Mechanic on the jetway with a new beige/orange oxygen mask that I had previously known not to seal up around my face. I asked I thought we were taking these off the aircraft because they don't seal up and he said he didn't know but this one came from the parts room at the hangar. Maybe it's possible I do not understand the engineering of these new oxygen masks and air is expelled out these large gaps to prevent smoke from entering; or they fit perfectly on square faced person; or they are poorly designed masks. But I do think we need to take a closer look please.
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.