What was found
AFTER TAKEOFF, UPON GEAR RETRACTION, THE 3 GREEN GEAR LIGHTS EXTINGUSHED AND HAD RED UNLOCK LIGHT ILLUMINATED ,TWENTY SECONDS LATER ,GREEN NOSE GEAR LIGHT ILLUMINATED , AIR SOUNDS DURING RETRACTION INDICATED NOSE GEAR NEVER RETRACTED. TROUBLESHOT TO NLG STRUT NOT EXTENDING FULLY. DISASSEMBLED, CLEANED, INSPECTED, AND REPACKED NOSE STRUT IAW MM 32-20-02. GEAR RETRACT AND OPERATIONAL CHECKS GOOD.