What was found
IAH - FLIGHT 2944 - THE CREW REPORTED, PERFORMED AN AIR RETURN DUE TO A LANDING GEAR AIR/GROUND FAIL MESSAGE. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, AND REMOVED AND REPLACED THE RIGHT "A" PROX SWITCH, AND ADJUSTED THE AIR GAP ON THE LEFT WOW PROXIMITY SWITCH. OPERATIONALLY TESTS WERE PERFORMED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.