As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PUSHBACK FROM THE GATE AREA AT YUL, THE PUSHBACK CREW REPORTED THAT THE RIGHT INNER WHEEL WAS CRACKED. THE AIRCRAFT WAS RETURNED TO THE GATE WITHOUT INCIDENT. MAINTENANCE REPLACED THE RIGHT INNER AND RIGHT OUTER MAIN WHEEL AND TIRE ASSEMBLIES. NOTE: IT WAS REPORTED THAT A 22 INCH SECTION OF THE RIGHT INNER WHEEL HAD SEPARATED WHEN THE AIRCRAFT DEPARTED DTW TO YUL. THE 22 INCH PIECE OF WHEEL MATERIAL WAS RECOVERED IN DTW.