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 WHEN ATTEMPTING TO TAXI AFTER PUSHBACK, BRAKES SEEMED TO SEIZE UP, UNABLE TO MOVE AIRCRAFT. MAINTENANCE REPORTS NO.4 MLG BRAKE FAILED, LOCKED UP. REMOVED AND REPLACED NO.4 MLG BRAKE ASSEMBLY IAW AMM 32-41-41.