As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED DIFFICULTY STARTING AIRCRAFT. UPON INSPECTION OF THE FUEL SERVO, THE MIXTURE CONTROL STOP SCREW WAS FOUND MISSING. THE SAME STOP SCREW ON THIS SERVO SERVES FOR BOTH FULL RICH AND IDLE CUT-OFF. THE SCREW AND BUSHING WERE COMPLETELY GONE ALLOWING UNCONTROLLED MIXTURE TRAVEL. THIS SCREW IS NORMALLY SAFETIED. RECOMMENDATION IS CLOSE INSPECTION BE GIVEN TO ALL SAFETIED ITEMS DURING SCHEDULED MAINTENANCE. (X)