Thales Cleared
Simultaneous reject of ADs. All three. This suggests Ice was not at work, but something else. Entry into upwelling airmass, which decreases the speed readings. What else is affected by a large shift in wind direction? AoA vanes, which would read (again, simultaneously) falsely high, perhaps quite high. What would the AutoFlight do? Decrease thrust, and PITCH DOWN, Another result? WIND SHEAR, and TCAS action.
As the a/c responds, the computers have by now rejected the airspeeds as too quickly divergent from cruise speed, and the a/p drops out.
The a/c has 1000fpm UP/VS, the Nose is DOWN 4 degrees from cruise, and due a tangential entry into the upwelling vertical, a ROLL (Left wing rise, to be more precise).
This is all on the traces, (save for the tangential entry) for the last four seconds of autoflight. I repeat, it is on the traces supplied by BEA.
The false high AA's and low "speed" have caused a spurious STALLWARN in the cockpit, as PF takes over. All but this have been done to death. Anyone? TurbineD?
So would a "resident" LKas (Last Known airspeed), have helped? Subject to inertial updating? A reserve Probe, to enter an abruptly presenting "new" airmass, and sample the "new" attitude dependent a/s? Because if this is what happened, then the Probes are fine, and the Autoflight needs some serious work.