As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, THE HEADING MODE OF THE FLIGHT MANAGEMENT SYSTEM FAILED AND THE CREW ABORTED TAKEOFF. THE CREW CALLED MAINTENANCE CONTROL AND RESET THE SYSTEM. FLIGHT 4032 ATTEMPTED A SECOND TAKEOFF AND DEPARTED WITHOUT ANY OTHER INCIDENTS.