What was found
FLT 4269 - AFTER TAKEOFF, SETTING CLIMB POWER, COULD NOT MATCH TORQUE WITHOUT SPLIT BETWEEN CONDITION LEVER POSITIONS. LEFT C.L. AT FULL STOP. CREW ELECTED TO RETURN TO FIELD. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. DAY/MX INSPECTED AIRCRAFT AND DISCOVERED A FAULTY CONSTANT SPEED LIMIT. REPLACED LT C.S.U. IAW MM 61-21-03. OPS CHECKED GOOD IAW MM 61-00-06. TEST FLIGHT GOOD, AIRCRAFT RETURNED TO SERVICE.