What was found
DFW - FLT T1911 - AFTER TAKEOFF, THE RIGHT MAIN GEAR OPEN LIGHT STAYED ILLUMINATED AFTER RAISING THE GEAR HANDLE. CREW RAN CHECK LIST PROCEDURES AND THE RIGHT MAIN GEAR DOOR LIGHT REMAINED ILLUMINATED. AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED RIGHT MAIN GEAR DOOR SENSOR, CYCLED LANDING GEAR SEVERAL TIMES. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)