What was found
DFW - FLT 1318 - EN ROUTE DFW-CMH, ON TAKEOFF, DETECTED NOSE GEAR LIGHT ILLUMINATE AT COCKPIT. RETURNED DFW AND LANDED WITHOUT INCIDENT. REPLACED O-RING AT NOSE LANDING GEAR SCHRADER VALVE. SERVICED STRUT. SWUNG NOSE LANDING GEAR PER THE MM. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)