What was found
DFW - FLT 728 - AFTER TAKEOFF MCI, RED NOSE GEAR LIGHT REMAINED ILLUMINATED. RECYCLED GEAR, NO HELP. LIGHT WENT OUT DURING CRUISE AT 31,000 FEET. LANDED DFW WITHOUT INCIDENT. REPLACED NOSE GEAR LOCK SENSOR, SWUNG NOSE GEAR. GEAR UP LIGHT EXTINGUISHES. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)