What was found
ORD - FLT 267 - ON TAKEOFF ORD, NOSE GEAR FAILED TO RETRACT. AIRCRAFT RETURNED TO ORD AND LANDED WITHOUT INCIDENT. SERVICED STRUT, LUBRICATED GEAR. ACCOMPLISHED GEAR RETRACTION CHECK SEVERAL CYCLED WITH NO DEFECTS, COULD NOT DUPLICATE. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)