I am the captain on AF447, I enter the cockpit, the right seater maintains the yoke to his stomach using both hands and the STALL WARNING continuously warns : I have here very serious indications what the problem is, don't you think ?
Yes. The right seater is clearly in a Boeing.
Seriously, the reaction to a stall warning in an Airbus is exactly the same as in any other aircraft. Reduce the angle of attack.