What was found
IAH - FLIGHT 2479, THE CREW REPORTED A STRONG ELECTRICAL BURNING ODOR IN THE COCKPIT AND FWD CABIN ON LANDING. MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED THE NR 1 PACK ON MEL 21-60-05/1 CAT C, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. ON FLIGHT 2466, THE AIRCRAFT RETURNED TO IAH WHERE MAINTENANCE RESECURED A LOOSE COUPLING ON THE NR 1 DUAL TORQUE MOTOR VALVE, OPERATIONALLY CHECKED WITH NO DEFECTS, REMOVED THE MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.