As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAXI FOR TAKEOFF, A BRAKE OVERHEAT WARNING MESSAGE ILLUMINATED, FOR ALL FOUR BRAKES. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED, ADJUSTED AND LUBED THE EMERGENCY PARK BRAKE HANDLE, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-43-02. OPERATIONAL CHECKS WERE COMPLETED.