Collective to yaw coupling felt in controls
Hello all,
Am flying an S76 again after some time away from Sikorskys. One of our two aircraft has noticable feedback from one control to the other, i.e. the collective moves when pushing pedal and vice versa, when making normal control inputs, both during ground taxi and in flight. All pilots notice it but I seem to be the only one who thinks there's something not quite right.
As I understand the system, collective to yaw coupling should not be felt by the pilot in normal flight (only at major control deflections, like when the T/R is at full pitch and additional pedal is added etc.) Any feedback felt between the collective and pedals would indicate a sticking point somewhere.
Are my memory banks foggy? Do I misunderstand the system and is the feedback perfectly normal? Is the rigging off? Is there some binding somewhere?
Hoping the interweb's collective wisdom on the S76 will resolve my anxiety. Thanks!