what is the missing link ?
the aircraft entered into a mesoscale Cb, it may have encountered moderate turbulences (AMDAR), ~02:10Z at the time when it may have experienced very low temperatures (from known last pos./traj. and satellite IR imagery), sudden cascade of fault reports, corrupted airspeeds, loss of flight assistances/ALTN 2, possible multiple stall alerts resulting from largely underestimated airspeeds due to Pitot freezing (from past cases like Air Caraïbe, not an established fact), QRH/procedures implementation, crew intructed to react to stall alerts (because based on the AoA not airspeed), pich & thrust and manual flight, possible reset attempt of PRIM/SEC (crew still struggling with their avionics around 02:13Z ? not an established fact, one of the 2 possibilities).
believing in an imminent stall as requested by the procedure (taking the opposite choise than the one made by the Air Caraibe Cpt), what would be the appropriate action then ?
pich down or/and augment thrust, trade altitude for speed ? Would the most probable outcome of such an action be an overspeed ?
If yes, between a high altitude overspeed and an aircraft falling nearly like a stone on the surface with a slightly positive pich (damages on the VS) or on its belly (as described by the BEA, but still "in line of flight", suggesting with the suitable attitude to fly), what could be the missing link/event ?
-could a high speed mach buffet resulting from the overspeed (wrong reaction to a stall alert) explain a stall initiation ? (with a rear CG at >35 % of RC). Are there such things like a stall with a positive pich ? (nose up/tail down). Could the reversed air stream have flamed out the engine or tore the spoilers/ailerons away from the wings ? could it result in a near vertical fall with very little residual lift ?
-or could an attempt to stabilize the altitude (ressource) in overspeed have generated excessive load factors (positive Gs) or aerodynamical stresses, in particular on the control surfaces like the ailerons ? could the loss of control/stall have originated from their failure ?
-or could a severe ice ingestion have flamed out the engines, making the AF 447 at best a glider without airspeeds and visibility in a tropical Cb. wouldn't this suppose a significant horizontal speed at the impact with the surface (compatible with BEA findings on debris, on the Galley G2 ?)
-or could a severe updraft or windsheer have driven the plane out of its flight enveloppe like the Russian plane ? (worsenned by the FMGEC/windsheer prot. impaired ?) doesn't this option render the Pitot freezing event as incidental ?
Jeff