What was found
AFTER TAKEOFF, PILOT FOUND THAT THROTTLE MOVEMENT INEFFECTIVE AND HE COULD NOT REDUCE POWER (ENGINE WAS AT FULL TAKEOFF POWER). PILOT RETURNED TO AIRPORT AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE THROTTLE CABLE HAD WORN COMPLETELY THROUGH APPROXIMATELY 3 INCHES FROM THE SWAGED FITTING AT THE ENGINE END OF THE CABLE. THE WIRE ROPE IS CONTAINED IN A HOUSING, AND DUE TO THE FACT THAT BOTH END FITTINGS ARE SWAGED ONTO THE WIRE ROPE, IT IS NOT POSSIBLE TO ACCESS THE CABLE TO INSPECT IT FOR WEAR.