What was found
ON APPROACH INTO CLE, LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR EXTENSION. CREW PERFORMED EMERGENCY GEAR EXTENSION PROCEDURES AND AIRCRAFT LANDED WITHOUT INCIDENT. DAMAGE TO THE LEFT INBOARD DOOR WAS INCURRED ON LANDING. MAINTENANCE FOUND LEFT MAIN GEAR DOOR TORQUE TUBE SEQUENCE ROD ATTACH FITTING RIVET FAILED. REPLACED TORQUE TUBE, LEFT DOOR ASSEMBLY, AND RIGHT DOOR BUMPER SKID PLATE. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.