What was found
(CAN) UPON START UP IN THE FIELD AT A REMOTE SITE, THE PILOT FIRED THE ENGINE AS NORMAL AND ENGAGED THE CLUTCH, AS HE WAS AWAITING THE CLUTCH ENGAGEMENT, HE REPORTED HEARING A LOUD BANG AND NOTICED HIS ENGINE RPM FLUCTUATED. HE IMMEDIATELY SHUTDOWN AND CALLED MAINTENANCE. UPON INVESTIGATION AND DISSASEMBLY OF THE CLUTCH ACTUATOR, THE BRASS PORTION OF JACK SCREW, NUT SECTION, WAS FOUND COMPLETELY STRIPPED OUT.