Devil re 206 hyd check
Thanks... that must be the interconnecting valve then.. if you have any more detail on that I would appreciate it. Is there a double acting actuator (two pistons on one shaft) in this 'servo control unit'? At60%N1 you are looking for a jump in the stick.. Perhaps this check detects a sticky/damaged piston on one side of the double acting actuator?
I am not sure I see how this particular check might reveal a failure in the interconnecting valve itself though as surely there would be no change if it were to not operate? The later check at 100%N2 when you move the sticks will prove the interconnecting valve has released the hyd pressure though and would do as you described though...? I may be thinking of a totally unrelated system though as I have no specific info on the 206 system.