Originally posted by Lyman ...
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.
Now that 'take' on what may have happened is not unreasonable.
Away back in the 'AF447' thread I posited that mesoscale system to the east of 447 had a high level clockwise circulation. So it could well be that the pocket of upwelling air that confronted the a/c could have also been a southerly of + 60 KTS. If it had impacted the right wing first, the wing would have lost lift and hence the right roll and nose down.
Perhaps a closer look is needed, though super cooled icing could also have played its instantaneous card - as the conditions seemed to have been ideal for that phenomenon.