What was found
DURING DECENT, THE PILOT WAS UNABLE TO REDUCE POWER. USING THE MIXTURE CONTROL, THE PILOT MADE AN UNEVENTFUL LANDING. MAINTENANCE PERSONNEL FOUND THE ACCELERATOR DISCHARGE TUBE LAYING ON THE BOTTOM OF THE INTAKE AIRBOX. IT WAS DETERMINED THAT THE ACCELERATOR DISCHARGE TUBE SEALANT (LOCKTITE) HAD FAILED, CAUSING IT TO SEPARATE FROM THE ACCELERATOR DISCHARGE PORT. THIS CAUSED THE DISCHARGE TUBE TO LIFT UP THROUGH THE BOOST VENTURI BLOCKING ANY MOVEMENT OF THE THROTTLE VALVE.