What was found
TUL - FLT 9515 - AFTER TAKEOFF, NOSE GEAR WOULD NOT RETRACT, GEAR GREEN LIGHT WAS ILLUMINATED. CYCLED GEAR TWICE AND GREEN LIGHT STAYED ILLUMINATED. GEAR HANDLE MOVEMENT FELT NORMAL. RETURNED TUL AND LANDED WITHOUT INCIDENT. ADJUSTED NOSE GEAR DOWNLOCK SENSOR. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)