What was found
DFW - FLT 1066 - AFTER TAKEOFF FROM DEN, RED NODE GEAR LIGHT REMAINED ILLUMINATED WITH GEAR HANDLE UP. LIGHT EXTINGUISHED AT 270 KNOTS. CONTINUED FLIGHT AND LANDED DFW WITHOUT INCIDENT. REPLACED UPLOCK SENSOR AND ACCOMPLISHED GEAR SWING. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)