Catchup,
Do you reall think that the pilots of 587 MEANT to go stop to stop on the rudder? I knew them both, and flew with them both, and have a LOT of time in that particular make and model.
If they didn't mean to do it, its a pilot induced oscilation. The need for coordinated rudder at 250 knots is a once in a career item, that most people will never experience in real life. If you give it a try in the A300 you will be in for a rude shock.
I was involved in the investigation, and did a lot of research on the subject and the aircraft, including climbing up inside the tail of its sister ships.
Cheers
WIno