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CJ3 captain experiences inflatable oxygen mask harness failure while removing the mask at FL400.
| Attributes | |
| ACN | 870386 |
| Time | |
| Date | 201001 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citationjet (C525/C526) - CJ I / II / III / IV |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
One hour after we departed at cruise altitude of FL400; I put on oxygen mask to alternate with captain on oxygen use above FL350. The captain depressed the red toggles to inflate his harness at which time the harness deflated with a momentary hissing noise. I continued to use oxygen all the way to 10;000 ft on the descent as a precaution. His mask was still usable; just harness would not inflate. Captain called company just after the occurrence. We continued and landed without incident.
Original NASA ASRS Text
Title: CJ3 Captain experiences inflatable oxygen mask harness failure while removing the mask at FL400.
Narrative: One hour after we departed at cruise altitude of FL400; I put on oxygen mask to alternate with Captain on oxygen use above FL350. The Captain depressed the red toggles to inflate his harness at which time the harness deflated with a momentary hissing noise. I continued to use oxygen all the way to 10;000 FT on the descent as a precaution. His mask was still usable; just harness would not inflate. Captain called company just after the occurrence. We continued and landed without incident.
Data retrieved from NASA's ASRS site as of April 2012 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.