What was found
DFW - FLT 594 - AFTER TAKEOFF, THE RIGHT MAIN GEAR DOOR OPEN LIGHT STAYED ILLUMINATED AFTER RAISING THE GEAR HANDLE. CREW RAN CHECKLIST PROCEDURES AND THE RIGHT MAIN GEAR DOOR LIGHT REMAINED ILLUMINATED. AIRCRAFT RETURNED TO DFW AND LANDED OVERWEIGHT WITHOUT INCIDENT. REPLACED RIGHT MAIN GEAR DOOR SWITCH. CYCLED LANDING GEAR SEVERAL TIMES. OVERWEIGHT LANDING INSPECTION REVEALED NO FINDINGS. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)