What was found
IMMEDIATELY AFTER TAKEOFF, BOTH QYT MESSAGE AND LIGHT FOR L HYD PRESSURE WAS STILL GOOD. FIVE MINUTES LATER L PRESSURE WENT TO ZERO WITH PWR XFER UNIT STATUS MESSAGE. TEN MINUTES LATER LOST RUDDER RATIO AND L-YAW DAMPER. FOUND RT MAIN GEAR RETRACT ACTUATOR HOSE 340 REF IPC 32-32-51- 16 BROKEN. REMOVED AND REPLACED HOSE IAW M/M CHAPTER 20-10-10 401/404. REF LG PAGE 8420684 FOR LEAK CHECK, REFILL, AND REMOVED AND REPLACED OF HYD FILTERS.