Originally posted by DozyWannabe ...
The Stall Warning sounded initially, at 2:10:10.4 and at 2:10:13. This was in response to the drop in IAS caused by the blockage of the pitot tubes. This is likely a false warning and stops. I would suspect (though I have no proof as my notes don't go into the required detail) that the IAS component of the stall warning logic is disabled when an ADR DISAGREE status is in effect - at least, if I was designing the logic, that is how I'd have it work.
The SW sounded because the allowable AoA had been exceeded - see:-
Post #1160 - AF447 Thread No.5
It was in response to the initial pitch-up, and nothing to do with IAS.