The Sea King AFCS incorporated a yaw rate damper, but don't recall it being any use in the scenario you refer to.
Wunper
Would your experiences then explain why I spent half of my time on MARTSU up the back end of Lynx fixing cracks???
Our response to the problems was to beef up the airframe at the upper longerons and transportation joint, including surrounding frames, thus achieving the effect of preventing cracks in those locations and initiating new ones elsewhere
FT