A32X: The oxygen flow only starts when a passenger pulls the mask towards the seat. Then the generator starts. One generator for the row. Worst case: You've got in every row one person, then you get all the generators activated, and I suppose this will rise the O2 partial pressure in the cabin. But with full house?
FCOM:
Chemical generators produce the oxygen. Each generator feeds a group of 2, 3, or 4 masks.
...
The generation of oxygen begins when the passenger pulls the mask towards the passenger seat. The chemical reaction used for oxygen generation creates heat. Therefore, the smell of burning or smoke, and cabin temperature increase, may be associated with the normal operation of the oxygen generators.The mask receives pure oxygen under positive pressure for about 15 minutes, until the generator is exhausted.
Additional question: The FCOM does not state if the Oxygen gets mixed with ambient air or not. I think it gets mixed, but I'm unsure right now. Anybody knows?
Last edited by MD11forever; 25th Jul 2009 at 16:34.
Reason: Additional Question