What was found
APPROXIMATELY ONE HOUR AFTER DEPARTURE FROM ELIX, NR 3 HYD SYSTEM LOSS. AS PER CHECK SHEET NR 3 EDP TO -SUPPLY OFF-, NR 3 ENGINE RUNNING. RETURN TO ELIX, NO FURTHER INCIDENT. FOUND INOPERATIVE RUDDER POWER CONTROL ASSY. REMOVED INOPERATIVE UNIT, AND REPLACED WITH SERVICEABLE UNIT IAW MFG MM 27-21-16 & 12-12-01. SATISFACTORY PERFORMED LEAK CHECK, FUNCTIONAL/OPERATIONAL CHECK, OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.