What was found
TUS - FLIGHT 3150, THE CREW REPORTED AN AIR/GRND FAILURE INDICATION AFTER TAKEOFF. THE AIRCRAFT RETURNED TO TUS WHERE IT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS INSPECTED FOR THE PURPOSES OF A FERRY FLIGHT, AND WAS FERRIED IAH WHERE MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.