What was found
ORD INFLIGHT T681/19MAY - ON FIRST APPROACH AUTO SPEEDBRAKE INDICATION WHEN SPOILERS ARMED. RESET NO HELP. WHEN LANDING GEAR EXTENDED RIGHT MAIN LANDING GEAR UNSAFE INDICATION. INITIATED GO AROUND AND LOWERED LANDING GEAR MANUALLY. LANDED ORD WITHOUT INCIDENT. FOUND HYDRAULIC LEAK IN GEAR AREA. AIRCRAFT TAKEN OUT OF SERVICE FOR REPAIR. REPLACED HYDRAULIC LINE. SYSTEM GROUND CHECKED NORMAL OPERATION.