As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DECLARED EMERGENCY INTO JFK DUE TO A SUSPECTED LEFT MLG TIRE TREAD SEPARATION AFTER RECEIVING A REPORT OF TIRE DEBRIS IDENTIFIED IN SEA. INSPECTION CONFIRMED TREAD SEPARATION ON THE NR 1 TIRE WITH NO LOSS OF PRESSURE. REPLACED LT MLG TIRE. (LP 9077959 - AIRCRAFT WAS GROUNDED)