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When the first officer left the cockpit for a break a B-737NG captain donned his O2 mask and discovered a leak in the self inflating harness. The captain expressed concern as to the frequency of operational inspection of the masks.
| Attributes | |
| ACN | 1099963 |
| Time | |
| Date | 201307 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 91 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
At about two hours into our three-hour flight; the first officer needed to leave the cockpit to use the lavatory. I took my oxygen mask out the holder; cleaned it; and noticed that there seemed to be a small leak in one of the inflatable straps. A logbook entry was made to replace the mask. My concern is how often these masks are checked out of the aircraft container by maintenance. I believe these masks should be fully checked (out of the container) each day.
Original NASA ASRS Text
Title: When the First Officer left the cockpit for a break a B-737NG Captain donned his O2 mask and discovered a leak in the self inflating harness. The Captain expressed concern as to the frequency of operational inspection of the masks.
Narrative: At about two hours into our three-hour flight; the First Officer needed to leave the cockpit to use the lavatory. I took my oxygen mask out the holder; cleaned it; and noticed that there seemed to be a small leak in one of the inflatable straps. A logbook entry was made to replace the mask. My concern is how often these masks are checked out of the aircraft container by Maintenance. I believe these masks should be fully checked (out of the container) each day.
Data retrieved from NASA's ASRS site as of July 2013 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.