What was found
AFTER TAKEOFF, GEAR SELECTED UP, NLG WHEEL INDICATOR LIGHT STAYED GREEN WITH SOUND INDICATION, GEAR DOORS WERE STILL OPEN. MLG SWITCH WAS SELECTED DOWN WITH 3 GREEN INDICATIONS OF DOORS OPEN. SELECTED GEAR UP AGAIN WITH SAME INDICATION. MLG SELECTED DOWN WITH 3 GREEN LIGHTS & NORMAL LANDING ACCOMPLISHED. ON FIRST CYCLE BOTH MAINS RETRACTED NLG WENT ALMOST ALL THE WAY UP. THEN FELL BACK OUT. TROUBLESHOT TO UPLOCK SEQUENCE ACTUATOR. R & R NLG UPLOCK ACTUATOR. SWUNG GEAR, OPS CHECKED GOOD. BLED HYD SYS. PERFORMED LANDING GEAR ADJUSTMENT TEST AND LEAK CHECKED GOOD IAW MM 32-30-05.