Svarin :
How do you know the aircraft was actually aware of ADR DISAGREE at 0210Z ? The sequence of ACARS messages says NAV ADR DISAGREE (which sounds somehow something else than F/CTL ADR DISAGREE ?) at 0212Z, giving us a full minute at least between A/P OFF A/THR OFF and your proposed going into ALTN LAW 2.
Takata is right.
You don't take a "WRN" message, coming straight from the flight warning computer to the CMC then the ATSU with the same degree of urgency as the "FLR" message which is an advisory to the maintenance department.
Look again at the reversion page already posted several times on this forum and see that , pertinent here, the condition for an auto pilot disconnect is a dual ADR fault and the reversion is to ALTN 2 PROT LOST.
emu787:
did the AFCS detect low speed - about to get a stall or low speed buffet boundary approaching (erroneous airspeed information) and the computer pitched the aircraft nose down and applied full power thinking this is the way to recover. This would almost certainly result in instantaneous excessive speed that would test the integrity of the airframe to its limit.
Nice try. You just forgot that the autothrust had disengaged, too and if anything, we have here a thrust lock. You need another theory.