As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 1 BRAKE ASSEMBLY APPEARED TO BE SMOKING DURING TAXI. MAINTENANCE JACKED THE AIRCRAFT AND INSPECTED THE BRAKE ASSEMBLY. THE BRAKE WAS COLD TO THE TOUCH AND WEAR PINS INDICATED A NEWER BRAKE ASSEMBLY. THE BRAKE ASSEMBLY WAS CHANGED AS A PRECAUTION. LEAK AND OPS CHECKS WERE GOOD AND THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.