What was found
ATTEMPTED TO RAISE GEAR AFTER TAKEOFF. GEAR FAILED TO RETRACT. RECEIVED A GEAR DISAGREE CAUTION EICAS AND GEAR DOORS WARNING EICAS. DOOR LIGHTS ON GEAR INDICATION PANEL ILLUMINATED. GEAR HANDLE LOWER AND REGAINED THREE GREEN ON AND DOORS LIGHT OUT. REMOVED & REPLACED NOSE GEAR ACTUATOR IAW MM 32-34-03-4. LEAK CHECK PERFORMED & FOUND SATISFACTORY, PERFORMED SEVERAL NOSE GEAR DOOR OPENING & CLOSING IN ORDER TO BLEED HYDRAULIC. NOW, FWD NOSE GEAR DOORS ARE FULLY OPENING. NOSE GEAR RETRACTION/EXTENSION COMPLIED WITH IAW MM 32-34-00-5. ALL TESTS PASSED.