"Please, read the link about the Helios flight "
The helios flight didn't change course in a controlled manner a number of times after it failed to respond to radio calls.
"Or maybe there was a slow enough depressurisation that they just didn't react correctly"
You realise that there are depressurisation alarms in airliners? Or are you going to suggest they failed too in your highly unlikely scenario? As soon as depressurisation occurs pilots should immediately descend to safe level. Not turn left. You're essentially saying that somehow depressurisation occured - the alarms didn't go off and/or the pilots o2 supply failed and yet one of them was still concious enough to take the plane on a joyright for a few hours but couldn't manage to work the radio? What a crock of ....
Biting the hand that feeds IT
