What was found
IAH - FLIGHT 6148, DURING LANDING GEAR EXTENSION THE CREW REPORTED A LG AIR GRND FAIL CAUTION THAT CLEARED IMMEDIATELY AFTER THE GEAR LOCKED DOWN. THE AIRCRAFT LANDED AT DEN WITHOUT INCIDENT WHERE MAINTENANCE CLEANED AND RESECURRED THE NLG WOW PROX SWITCH, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.