Actuator,
The attached picture is of a flange that has been added to portions of the trailing edge of the rudder and the electrical rudder tab on a Lear 45. As I said before, I was told this was done as a service bulleting to allow flight without the yaw damper.
Is this similar to what you see on the Citation?
Hawk
You can see the rudder tab at the bottom, with the rudder pretty well filling out the rest of the picture. The under portion of the right horizontal stab is on the right.