O2 for all crew for the full duration of the flight is NOT carried, O2 is carried sufficient to permit decent and travel to about 10000 ft In this case it will not be Oxygen that is the problem but CO2 which will still be present at lower altitude. You may find that you would not be aware performance is impaired. CO2 poisoning is a not very noticeable event leading to unconciousness and death. You not notice but some of the passengers may but not be able to do a thing about it.
Q Concentrations of more than 10% carbon dioxide may cause convulsions, coma, and death [1, 15]. CO2 levels of more than 30% act rapidly leading to loss of consciousness in seconds. Apr 4, 2017
Last edited by harrryw; 16th Dec 2020 at 06:57.