What was found
NOSE GEAR FAILS TO RETRACT AFTER TAKEOFF. MECHANIC JACKED AIRCRAFT AND PERFORMED 25 GEAR SWINGS. UNABLE TO DUPLICATE ALL COCKPIT INDICATION INDICATE NORMAL. HELD NOSE GEAR WHILE SELECTING GEAR UP TO CHECK GEAR ACTUATOR FOR POSSIBLE HYDRAULIC BYPASS, TECH UNABLE TO HOLD GEAR NO HYDRAULIC BYPASS INDICATION NOTED. DISCONNECTED NOSE GEAR DOORS PERFORMED GEAR SWINGS MONITORED NOSE GEAR UP LOCK MECHANISM NO ABNORMALITIES NOTED . REGULATED HYD MULE PRESSURES TO AS LOW AS 2200 PSI STILL NO DEFECTS NOTED. FSR RECOMMENDED REPLACEMENT OF NOSE GEAR UPLOCK.