What was found
FOLLOWING TAKEOFF AND AFTER SELECTING GEAR UP, GEAR FAILED TO LOCK UP. CREW SELECTED GEAR DOWN AND RETURNED TO LAND WITHOUT INCIDENT. AIRCRAFT FERRIED WITH GEAR DOWN. MAINTENANCE DETERMINED NLG ACTUATOR HAD FAILED. A SERVICEABLE ACTUATOR WAS INSTALLED AND AIRCRAFT RETURNED TO SERVICE. THIS IS SECOND FAILURE OF THIS SAME ACTUATOR SINCE AUGUST 2002. THE FIRST FAILURE OCCURRED AT 8375 TCSN, AND 375 TCSO. SECOND FAILURE OCCURRED AT 9060 TCSN AND 685 TCSO. ACTUATOR IS BEING RETURNED FOR INSP.