As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 3090, THE CREW REPORTED A LANDING GEAR AIR/GRND FAIL MESSAGE. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE ADJUSTED THE LEFT MAIN LANDING GEAR AIR/GRND PROXIMITY SENSOR, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.