As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE REMOVING THE WHEEL FROM THE RIGHT MAIN LANDING GEAR FOR ANNUAL INSPECTION, THE AXLE NUT WAS BINDING. REMOVED ALL AIR FROM THE TIRE AND THE BINDING WAS RELEASED. FOUND THE WHEEL CRACKED WITH THREE OF THE SIX THREADED INSERTS THAT HOLD THE WHEEL HALVES TOGETHER BROKEN OUT.