As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2038, DURING TAXI NR 1 EADI PITCHED DOWN APPROXIMATELY 8 DEGREES BANKED TURNS SETTING OFF SEVERAL MISMATCH MESSAGES ON THE ADVISORY DISPLAY. MAINTENANCE REPLACED NR 1 AHRU IAW D-8 200 MTX CARD 9340019. OPERATIONAL TEST GOOD. AIRCRAFT RETURNED TO SERVICE.