As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HOU - FLT 3926 - AFTER TAKEOFF CREW RECEIVED LANDING GEAR AIR/GROUND FAIL MESSAGE. AIRCRAFT RETURNED TO FIELD AND AN EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)