As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING PUSHBACK GROUND CREW REPORTED LIGHT SMOKE COMING FROM RIGHT MAIN GEAR. RETURNED TO GATE. UPON INSPECTION DISCOVERED BRAKE FAILURE ON RIGHT MAIN WITH METAL SHARDS PRESENT. FOUND NUMBER 3 BRAKE DAMAGED, REMOVED AND REPLACED NUMBER 3 MAIN LANDING GEAR BRAKE. PER AMM 32-42-41.