Separation of the pushrod tube and the control rod end with bearing was found.
Is the bolt just disappeared or has the bolt been cut? Servo Actuator defect could make a kickback affect to all flight controls. In case of kickback 3000 PSI working pressure will moves stick full aft position and collective will come max up position. When collective is fully up position Sikorsky’s mixing unit mechanical connection will make left pedal mechanically about 50 % left down position. This left down 50 % makes left spinning after the helicopter has lost airspeed.
A possibility for the lost bolt could be this hydraulic system kickback affect which has cut the bolt which is connecting the pushrod tube and the control rod end? Any picture available?