What was found
IAH - FLIGHT 2944 THE CREW REPORTED A LANDING GEAR AIR / FRND FAIL MESSAGE AFTER TAKEOFF. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR LEVER, AND RELAYS K0453, K0353, AND K0352, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.