VApilot, Since you have this data can you tell me where the rudder inputs were transmitted from? Rudder actuator or rudder pedals. If the front end of the vertical stab was waving in the slipstream were the rudder inputs causing the wild swings that threw the engines off or the front of the vertical stabilizer breaking lose? Also were the rudder inputs, if from the actual rudders, causing the yaw or trying to correct for a separating VS? Never have been able to get an answer to that.