No doubt they are worth their weight in gold when you really need them but sometimes, they really can be annoying. I have to admit that one time we had a report of fumes in the back and a slight smell in the cockpit. The checklist says Don O2 Masks but I just said that we will do it if we need it in order to avoid the hassle. We never did need it. That was at the old company. At the new company, you dare not take the O2 mask off at a cabin altitude of 10100' after an emergency descent on a checkride(you descent to 9000' first) or else you would fail for being dangerous.
C-FASP, an AirSprint Inc. Cessna 525A was conducting a flight between Raleigh-Durham Intl.
(KRDU), NC to Fort Myers/Page Field (KFMY), FL. After initial descent from FL400, cabin altitude
was noted increasing rapidly. Around FL380, the cabin altitude reached 10000 feet and
annunciator CABIN ALT came on. Flight crew actioned checklist memory items, donned oxygen
masks, initiated emergency descent and declared a MAYDAY with ATC. Internal cockpit
communications became severely limited due to the loud squelching of the oxygen mask over the
speaker. After checklist was completed, flight crew noted that cabin altitude climb stopped at
14,000 feet cabin altitude. ATC provided step down descent altitudes incrementally down to
10,000 feet. Once level the flight crew discussed the situation/fuel status and determined that they
would land at planned destination. The flight landed in KFMY without further incident.
Oxygen Mask Issues
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Re: Oxygen Mask Issues
Of course on a ride if you take it off early you'll fail. There are hard limits and wearing the mask above 10,000 feet is one of them.pelmet wrote: ↑Tue May 10, 2022 8:30 am No doubt they are worth their weight in gold when you really need them but sometimes, they really can be annoying. I have to admit that one time we had a report of fumes in the back and a slight smell in the cockpit. The checklist says Don O2 Masks but I just said that we will do it if we need it in order to avoid the hassle. We never did need it. That was at the old company. At the new company, you dare not take the O2 mask off at a cabin altitude of 10100' after an emergency descent on a checkride(you descent to 9000' first) or else you would fail for being dangerous.
C-FASP, an AirSprint Inc. Cessna 525A was conducting a flight between Raleigh-Durham Intl.
(KRDU), NC to Fort Myers/Page Field (KFMY), FL. After initial descent from FL400, cabin altitude
was noted increasing rapidly. Around FL380, the cabin altitude reached 10000 feet and
annunciator CABIN ALT came on. Flight crew actioned checklist memory items, donned oxygen
masks, initiated emergency descent and declared a MAYDAY with ATC. Internal cockpit
communications became severely limited due to the loud squelching of the oxygen mask over the
speaker. After checklist was completed, flight crew noted that cabin altitude climb stopped at
14,000 feet cabin altitude. ATC provided step down descent altitudes incrementally down to
10,000 feet. Once level the flight crew discussed the situation/fuel status and determined that they
would land at planned destination. The flight landed in KFMY without further incident.
It's like passing a STAR waypoint that is restricted at 5000 and 210 knots at 5100' and 220 knots.