Hypoxia in an aircraft produces no symptoms that a pilot can detect, weird because ppl on the ground with emphysema, pneumonia, or COPD, one feels this shortness of breath symptom? The pilot is making very poor decisions because hee has it bad, Master Caution light going off, why it's not Master wARNING I have no idea, it should be with no pressurization, the bird is very sick for some reason and he needs to get on the ground, but he's fooling around with circuit breakers. The flight engineer almost saved it with "is the pressure on auto" but he wasn't assertive enough. You just go to sleep and never wake up.
