Jimmy Hoffa Rocks
AOA information is used by FAC to calculate the protection speeds like alpha prot and alpha max( actually it is AOA shown as speed). These are high AOA protections basically meant to take care of pilot induced low speed situation. Since the normal operating AOA is much lower at higher Mach/speed, the threshold at which the alpha prot is triggered is also lowered. It is something like from 13 degrees to 5 degrees. When AOA sensors are stuck at low speed(high AOA) as the speed increases alpha prot gets triggered since AOA as received by FAC is above the high speed threshold. In this case the displayed alpha prot and alpha max will also be unduly high and incorrect. Alpha prot condition is a latching condition and will cause nose down elevator as long as speed is below this false Valpha prot. This protection can only be overridden when out of normal law. Hence the switching of two ADRs to get into alternate law. A simple solution can be not have this protection in cruise where its utility is minimal as it should be possible for a professional pilot to recover from stall without ground contact(or is it?)