(1)There 3 separate computers, not 2.
2. If the suspect airdata system was falsely reading a very high airspeed, the pilots would try to slow it down (nose up) before the pane went past the NTE speed and started breaking up in a dive.
Airbus problems are legend, thus, the moniker “SCAREbus.” These particular pilots likely were just trying to fly the darn thing. Getting false readings is always disconcerting, especially in what was probably pretty turbulent weather conditions.
The sudden climb could have been from causes besides the deliberate acts of the pilots. For instance, an elevator tab could have gone whacky and been almost under control so long as the computer was fighting it. Once shut off, the flight crew couldn’t overcome it. Lots of other scenarios, too.
Anyway, it’s a tragedy. I have loved ones who are pilots, some flying “heavies” in the USAF right now. I worry a bit, given the age of the stuff they fly.
Oldplayer