FED - the coupling for the variable stator actuator was (I believe) a pin through a fork-end (in simplistic terms). The significance was that on a Friday evening return to Tern Hill from Valley, one George K decided to make it a 'sporting arrival' - low, fast (for a WW!) run-in downwind, pull up for a torque turn and gently down to finish off the week. Unfortunately, and unknown to GK, the coupling pin had detached itself en-route and the application of collective at the appropriate moment produced a most eye-catching outpouring of flame and smoke and a subsequent relieved engagement with terra firma.
Very spectacular and almost as exciting as the day we discovered that it was possible to install the WW tail rotor the wrong way round!!
