SaveFerris wrote:I can't comment on Canada specifically but for what it's worth the US regulations call for one pilot to utilize oxygen when the other pilot leaves the flight deck anytime the aircraft is above FL 250. Also, there is a requirement for one pilot to be on oxygen anytime the aircraft is above FL 410.
Unfortunately the US regulations don't offer any relief for quick donning masks.
GalaxyFlyer wrote:The fact is the cabin, in the certification test, doesn't instantaneously get to anything like actual aircraft altitude. At F510, the test is to open a hole equivalent to a window, apply a reaction time and begin the emer descent- the plane and cabin "meet" below F250. The actual leak rate is quite low-1,500-2,000 fpm.
GF
SaveFerris wrote:I can't comment on Canada specifically but for what it's worth the US regulations call for one pilot to utilize oxygen when the other pilot leaves the flight deck anytime the aircraft is above FL 250. Also, there is a requirement for one pilot to be on oxygen anytime the aircraft is above FL 410.
Unfortunately the US regulations don't offer any relief for quick donning masks.
26point2 wrote:It's often said, and I concur, that these O2 requirements are the most violated of all the regulations. If you've ever worn a quick donning style mask you will know why. If you haven't, it's hell.
Word on the street is a European Ramp check (SAFA) after an Atlantic crossing might include a look at your ship O2 level. If still near 100% full then someone wasn't using the O2 as prescribed. Whoops.
RetiredWeasel wrote:26point2 wrote:It's often said, and I concur, that these O2 requirements are the most violated of all the regulations. If you've ever worn a quick donning style mask you will know why. If you haven't, it's hell.
Word on the street is a European Ramp check (SAFA) after an Atlantic crossing might include a look at your ship O2 level. If still near 100% full then someone wasn't using the O2 as prescribed. Whoops.
While I agree with your first paragraph, the second sounds like a BS type story. As far as I know, there is no requirement for the crewmember who puts the mask on to keep it in the 100% O2 mode. The regulator supplies very little oxygen mix when the cabin altitude is around 8000 ft. I doubt it makes much of a dent in the gauge even if done several times at normal cabin altitudes. Now if the pilot(s) did go 100% on the dilution lever/switch to ease a headache or something, then yes it could cut into the supply.
Starlionblue wrote:
Side note: There is a requirement for one crewmember to wear the mask when taking off from a high-altitude airport.
sadiqutp wrote:Starlionblue wrote:
Side note: There is a requirement for one crewmember to wear the mask when taking off from a high-altitude airport.
Thank you, is a 6900 ft high airport considered high-altitude?
Starlionblue wrote:Then again I haven't worked since 1993 so I don't know what the requirement was at the time.
bhill wrote:Hang on...in the US one pilot at cruise must wear a mask? In all the years I have been a passenger and thanked the flight deck crew member that was wishing us well after arrival, I do not remember seeing any "creases" on ANY face from prolonged use of a mask.....
rjsampson wrote:Starlionblue wrote:Then again I haven't worked since 1993 so I don't know what the requirement was at the time.
Haven't worked since 1993, or wasn't working in 1993? If you retired in 1993 and are still in the Danger Zone, you are one cool dude.
rjsampson wrote:Starlionblue wrote:Then again I haven't worked since 1993 so I don't know what the requirement was at the time.
Haven't worked since 1993, or wasn't working in 1993? If you retired in 1993 and are still in the Danger Zone, you are one cool dude.
bhill wrote:Hang on...in the US one pilot at cruise must wear a mask? In all the years I have been a passenger and thanked the flight deck crew member that was wishing us well after arrival, I do not remember seeing any "creases" on ANY face from prolonged use of a mask.....