AF447 reverted to alternate law due to the airspeed disagreement. But after the ice in the pitot cleared and the airspeed became reliable again, why didn't the A330 go back to normal law?
Would the crew have had to manually switch it back to normal law, or would the aircraft simply have stayed in alternate law for the rest of the flight (had it not crashed)?
Or did the fact that the aircraft was stalled when airspeed came back, (or was it earlier?) and so outside its safe flight envelope inhibit a return to normal law?