Gentlemen,
The NTSB Claims,
"excessive rudder pedal inputs by the first officer led to the separation of the vertical stabilizer and the crash of the aircraft, it also found that the A300-600 rudder design was a contributing factor to the catastrophe"
Forget the rudder!
No pilot would kick the rudder back and forth as recorded! No pilot could induce an 0.8 G force on the rudder and shear off both engines from their support structures, through pilot control inputs alone!
However, a 200 mph rotating vortices striking the 27' tall vertical stabilizer, BROADSIDE can! (NASA says that the rotating forces in an aircraft wake vortex can reach 300'/sec., a virtual horizontal tornado!)
The 0.8 G force striking the vertical stabilizer broadside, induced an instantaneous YAW maneuver, which sheared off both engines from the structure, through the forces of INERTIA! The 0.8 G force striking the vertical stabilizer broadside, sheared it off and induced an abrupt "Dutch Roll" into the ground!
The large flat plate surface area of the vertical stabilizer and rudder, become an additional flight control surface, when struck broadside by the clockwise rotating vortices of the Heavy B 747,s
vortex.
The engineers, not aware of the possibility of Broadside strikes on the tail surfaces, have inadvertantly designed a large and a very effective, "Weather Vane"!
However, this is the first accident, of this type, in 100 years of flight! (A perfect formation join-up on the center of a horizontal tornado!)