As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O FROM YYC, A LARGE PIECE OF TIRE RUBBER WAS FOUND ON RUNWAY, NO UNUSUAL INDICATIONS IN COCKPIT. LANDED IN LHR WITH EMERG SERVICES IN STANDBY, TIRE IS SHREDDED. ACCOMPLISHED INSPECTION AFTER TIRE BLOWN AS PER AMM 05-51-12, REF L4044129 FOR FINDINGS. REPLACED NR 6 TIRE DUE BLOWN AND MATING TIRE NR 5 AS PER AMM 32-41-11-400-801.