As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI-OUT, TOWER REPORTED SMOKE COMING FROM RIGHT MAIN LANDING GEAR. NR 4 BRAKE ASSEMBLY WAS LOCKED UP. FOUND NR 4 WHEEL ASSEMBLY BROKEN. REPLACED NR 4 WHEEL AND NR 4 BRAKE ASSEMBLY IAW DC8 MM. BROKEN WHEEL ASSEMBLY WAS SENT TO ALLIED SIGNAL BRAKE DIV FOR FURTHER ANALYSIS.