DJ77,
Of course I have no doubt that all the software was carefully studied and checked in all possible ways but sh*t happens. I agree this may be far-fetched and stand ready to be guillotined.
Do you still have your head attached to your neck ?
Probably not as you'd have all by yourself and svarin proven how and why that airplane plunged to the depths of the South Atlantic Ocean.
mm43's post and link should have given you some consolation.