As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 1HR INTO FLIGHT AT FL 380 WE RECEIVED LVL 1 TIRE PRESS LOW ON THE #5 TIRE. OVER TEH NEXT 5 MINUTES PRESSURE DECAYED UNTIL WE RECEIVED TIRE FAIL ALERT. FOLLOWED QRH PROCEDURES. PRESSURE SLOWLY DECAYED FOR THE REST OF THE FLIGHT TO 0 PSI. EMERGENCY DECLARED. LANDING WAS UNEVENTFUL. FIRE/RESCUE CONFIRMED FLAT TIRE. SHUTDOWN ON RUNWAY 36C AND TOWED TO PARKING. REMOVED AND REPLACED #5 AND #6 MAIN WHEEL ASSEMBLIES. TIRE PRESS CHECK OK.