What was found
(CAN) ON DEPARTURE THE LANDING GEAR RETRACTED NORMALLY. APPROXIMATELY 20 SECONDS LATER, THE NOSE GEAR CYCLED UNSAFE AND THEN RETRACTED. APPROXIMATIVE 10 SEC. LATER IT OCCURRED AGAIN BUT THIS TIME DID NOT RETRACT. FLIGHT CREW CYCLED GEAR DOWN MANUALLY IAW QRH BOOK, RECEIVED 3 GREEN LIGHTS (DOORS CLOSED) AND WHEN SELECTED GEAR UP, THE GEAR RETRACTED NORMALLY AND LOCKED. ON LANDING AT DESTINATION, LANDING GEAR EXTENDED NORMALLY AND AIRCRAFT LANDED NORMALLY. MAINTENANCE REPLACED THE NLG DRAG STRUT ACTUATOR. (TC NR 20070903001)