As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LG AIR GROUND FAIL MESSAGE ON LANDING AT 50FT. PERFORMED TROUBLESHOOTING. FOUND PROXIMITY SWITCH BRACKET ON RH MAIN LANDING GEAR LEG LOOSE. BRACKET BOLT WAS BROKEN. REMOVED AND ADJUSTED BRACKET AND REMOVED AND REPLACED TWO PROXIMITY SWITCH SENSORS. OPS CHECK GOOD.