As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - CREW REPORTED, LANDING GEAR AIR/GROUND FAIL MESSAGE AFTER TAKEOFF. COULD NOT RAISE LANDING GEAR. AIRCRAFT AIR RETURNED AND LANDED UNEVENTFULLY. IC 1-2 WOW INOP AFTER LANDING. MAINTENANCE TROUBLESHOT SYSTEM AND REMOVED AND REPLACED LANDING GEAR CONTROL LEVER IN REFERENCE TO EMB145 AMM 32-32-02. AIRCRAFT RETURNED TO SERVICE.