Although the pitot tubes on AF447 were due to be replaced with a type more resistant to icing, nonetheless there's no such thing as a 100% reliable pitot tube and there were procedures to follow in the event of unreliable airspeed indication. Had they been followed the accident would not have happened. Instead the co-pilot held back on his stick until the aircraft fell out of the sky.
I don't believe there was any issue identified with the software of the plane.
I don't believe there was any issue identified with the software of the plane.