As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS ON PUSH BACK, GROUND CREW ADVISED THEY THOUGHT SMOKE WAS SEEN AT #2 MAIN. ALSO FELT VERY NOTICEABLE VIBRATION IN FLIGHT DECK. MAINTENANCE FOUND OUTER ROTOR DISK DAMAGED AND BREAKING APART. REPLACED #2 (L1) BRAKE ASSY IAW AMM 32-42-27-000-001-A AND 32-42-27-400-001-A. REPLACED #2 (L1) MAIN WHEEL ASSY IAW AMM 32-41-11-000-006-A AND 32-41-11-400-006-A.