What was found
(CAN) ON CLIMB, B-SYSTEM FAILED WITH LOSS OF FLUID AND PRESSURE. FLIGHT WAS TURNED BACK. DURING APPROACH WITH FLAPS 15 AND GEAR SELECTED DOWN, THE AIRCRAFT CONTINUED TO ROLL. CREW USED A COMBINATION OF AILERON, RUDDER AND DIFFERENTIAL THRUST TO CONTINUE TO LAND WITHOUT FURTHER INCIDENT. ON THE GROUND, THE NR 7 FLIGHT SPOILER WAS FOUND IN THE FLIGHT POSITIION. INVESTIGATION REVEALED CRACKED CAP ON SPOILER PCU. REPLACED. PART TC: 14,370.