587
As I recall from a simulation I saw, the Ruddering got into phase with the Yaw, rather than in opposition to it, each successive 'correction' actually making the Yaw worse, followed by an even more pronounced Yaw, until the assembly separated. The Rudder stayed 'attached' for a time, but separated from the VS fairly soon after the separation from the fuselage. I think the initial conclusion was that the FO was bicycling the pedals, but that that is in serious dispute at this point?
Relative to the DC-10, the FO took off and lost the left engine, then buried his right foot to the floor to correct for yaw. The Captain took over, and some say his foot slipped or he didn't continue with full right rudder, and the subsequent Yaw left/roll at handover was unrecoverable.
bear