What was found
ORD - FLT 374 - AFTER TAKEOFF ORD WHEN LANDING GEAR RETRACTED, NOSE LANDING GEAR DID NOT RETRACT ACCOMPANIED BY INDICATIONS THAT AIRCRAFT WAS STILL IN GROUND MODE. AIRCRAFT RETURNED TO ORD AND LANDED WITHOUT INCIDENT. REPLACED NOSE LANDING GEAR ASSEMBLY. ACCOMPLISHED LANDING GEAR RETRACTION CHECK, NOSE GEAR STEERING CHECK, GROUND SENSING SYSTEM CHECK AND ALTERNATE GEAR EXTENSION CHECK WITH NO DEFECTS FOUND. SYSTEMS GROUND CHECKED NORMAL OPERATION. (M)