What was found
EYE SCREW, IS A SUPPORT STRUT WHICH ATTACHES TO THE EXHUST STACK AT ONE END AND THE FUEL SERVO TO ENGINE SUMP ATTACHMENT STUDS AT THE OTHER END. THE STRUT FELL BETWEEN THE THROTTLE ARM AND SUMP. THIS PREVENTED THE ENGINE FROM BEING ABLE TO REDUCE POWER BELOW 1500 RPM. CONDITION REPORTED BY PILOT AND FOUND BY MECHANIC. SUBMITTER REPLACED PART AND SECURED STRUT AT AN ADDITIONAL POINT IN CASE THE REPLACEMANT PART BREAKS AGAIN. THIS ADJUSTMENT WOULD PREVENT THE STRUT FROM FALLING INTO THE CONTROL LINKAGE IF THE PROBLEM REOCCURES.