As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AN OPERATOR HAS EXPERIENCED CRACKING OF THE 32-INCH MAIN LANDING GEAR WHEEL ASSEMBLY P/N 3-1575. THE CRACKS START AT THE WHEEL BOLT HOLES (FAYING SURFACE) AND EXTEND TO THE CUT-OUTS. THE CAUSE OF THE CRACKING IS NOT KNOWN AND IS CURRENTLY UNDER INVESTIGATION BY MANUFACTURERS. AOM NR 133 HAS BEEN ISSUED.