B747 300 & 400 Pax Oxy
Pax oxy sys on this aircraft, as stated previously, is of the 'stored gaseous type'.
Pulling down on a mask will activate o2 flow to THAT MASK ONLY.
Therefore, if pax are too shocked/innattentive to briefing to REMEMBER this, they may NOT have pulled down on their mask- if it was flapping in front of them my guess is they'd remember the part to grab it and put it on- but possibly forgot the part of "Pull down on it firmly"" in favour of put it on quickl˙, and ensure the strap is tight"
Most pax wouldn't know what a flow indicator is or how to check for oxy flow. (In this case, bag MAY inflate)
Flow can be shut off at individual units/masks when no longer required. Duration would vary on time of descent, number of pax, demand etc...
Yes, flight crew also have backup in the form of a portable bottle similar to those seen worn by the cabin crew in that video.
Last edited by Little_Red_Hat; 27th Jul 2008 at 09:15.
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