Ali sadakin,
The AA A300-600 crashed in the Queens broke the rudder.
The rapid pedal sharing had been taught to Learjet pilots to stop the dutch roll on their planes.
It seems that here, after the breaker pull a violent dutch roll developed without rudder loss (?) Maybe the FAC card had a repetitive bad contact and the yaw damper failed for that reason whose effect increased with rudder limiter stop.
(In any case pedal sharing is critical, but unless we have the dfdr data we are not sure that was the cause of the crash)