What was found
DURING TAKEOFF RUN, NR 1 EFIS DISPLAYED YELLOW HEADING FLAG. ABORTED TAKEOFF AND RETURNED TO GATE. MAINTENANCE REPLACED NR 1 ATTITUDE AND HEADING REFERENCE COMPUTER.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING TAKEOFF RUN, NR 1 EFIS DISPLAYED YELLOW HEADING FLAG. ABORTED TAKEOFF AND RETURNED TO GATE. MAINTENANCE REPLACED NR 1 ATTITUDE AND HEADING REFERENCE COMPUTER.