As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH MAIN WHEELS CRACKED. THESE ARE 3-PIECE WHEELS USED ON VARIOUS CESSNA SINGLES IN THE 1970'S. THIS SUBMITTER FEELS A MORE LIKELY CAUSE (OTHER THAN OVERTORQUING) IS STRESS CAUSED BY PULLING SMALL AMOUNTS OF ALUMINUM THROUGH THE THREADS EACH TIME THE BOLTS ARE REMOVED WHICH TENDS TO SPREAD THE HOLE.