As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED UNUSUAL NOISE ON TAXI. FOUND CHUNK OF AFT TIRE MISSING. MAINTENANCE DISPATCHED TO CHANGE TIRE. FOUND LARGE PORTION OF RECAP HAD SEPARATED FROM CORE TIRE. MAINTENANCE REMOVED AND REPLACED TIRE AND RELEASED AIRCRAFT BACK INTO SERVICE. (X)