What was found
IAH- DURING FLIGHT 3628, ON APPROACH THE CREW NOTED THAT THE AIR/GND FAIL. THE CREW DECLARED EMERGENCY AND PERFORMED A EMERGENCY DESCENT WHILE ON APPROACH. AFTER LANDING IT WAS NOTED THAT THE SPOILER INOP, LEFT REVERSER INOP. MAINTENANCE REMOVED AND REPLACED THE NR 1 WEIGHT ON WHEELS PROX SWITCH, PERFORMED A OPERATIONAL CHECK OF THE LANDING GEAR SYSTEM, NO DEFECTS NOTED. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.