Iirc the problem was an iced pito tube that gave unreliable airspeed coupled with operating in a different reality (mode of flight control per airbus) coupled w

Iirc the problem was an iced pito tube that gave unreliable airspeed coupled with operating in a different reality (mode of flight control per airbus) coupled with differing inputs from both pilots coupled with the fact that the stall warning was disengaged below a certain airspeed. All too often these crashes are not one single cause but a series of unfortunate events.