What was found
AT 1000 FT AGL AND 10 DEGREES BANK TO THE RIGHT (AFTER TAKEOFF), THE GREEN SYSTEM RESERVOIR LOW LEVEL LIGHT ILLUMINATED WITH HYD ON MAP. THE FLUID QUANTITY NEEDLE REGISTERED IN THE YELLOW ARC. THE LIGHTS EXTINGUISHED SOON AFTER WINGS LEVELED AND THE FLUID QUANTITY NEEDLE STABILIZED JUST ABOVE THE YELLOW ARC FOR THE REMAINDER OF THE FLIGHT. THE GEAR WAS UP AND FLAPS AT 15 DEGREES WHEN AMBER LIGHTS FIRST ILLUMINATED. RETURNED TO DEN. FOUND THE FORWARD PASSENGER DOOR FORWARD ACTUATOR LEAKING. REMOVED AND REPLACED WITH SERVICEABLE UNIT. OPS CHECKS GOOD.