The Living Force
I thought of that possibility too, albeit reading now that the daughter also had a pilot license, makes it less likely that it was a jab stroke being the cause.Or you can lose consciousness for other reasons :
Or wait a minute… if the father was the pilot, and let me assume that there was already something off with his condition prior (e.g. being less focused in all the procedures prior and during take off ) - he may very well have failed with pressurizing the cabin. Then, his daughter’s pilot license would not have saved anyone, since hypoxia would affect them all. But… that is pure speculation from my side.
And there is always a possibility of sabotage by a hidden hand, for reasons unknown.