BAD HARDWARE WEEK

According to the Australian Transport Safety Bureau, investigators pinpointed a fault in one of the flight computer systems as a potential cause of the near disaster.

A navigation device used on the same type of plane recently malfunctioned on two flights, causing one to lose control. Though , it is not clear how computer could send the plane in fire noticed by some passing airliner. Thunderbolt is more likely.

And the bomb the most.
Unnamed experts quoted by the Le Monde newspaper said the "wide dispersion of wreckage discovered suggests that the Airbus (A330-200) exploded at high altitude".
Investigators will examine a bomb threat made against a flight from Buenos Aires to Paris just days before Flight 447 disappeared.