It is a poor design. There have been many instances where the yaw damper moved
the rudder creating yaw instead of damping it out. Also consider that the
rudder moved six times in one second. I'm not sure thats possible to do in that
airplane with all systems working normally. Even if it is possible why would
you put a rudder limiter on an airplane that doesn't fully protect the
structure? Why not leave it off and tell the pilots not to push too hard if
thats what you're gonna do anyway? And why is it okay to "waggle" the rudder in
the alternate gear extension procedure and not during a wake turbulence
encounter?