Originally Posted by
777JRM
Icing in the climb?
Possible, but not likely. SOP is probe heat ON after start. As others have said, low CB activity in the area they passed through. Icing at 10000 ft in a CB is possible, but otherwise you need to get higher than
10-11000 ft before you encounter icing in this area. Besides, unreliable airspeed does not lead to a straight down descent.
Something severe happened very fast with this flight. Even if you lose control you will try to do something to regain control. That would show up on the data, but they went down fast without much input to reverse the situation. It feels like a deliberate action or a situation it was not possible to get out of.