As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2084, ON TAXI OUT, FIRST OFFICER'S ADI SHOWED FIVE DEGREES DOWN PITCH AND FIVE DEGREES RIGHT TURN. ALSO, PITCH/ROLL MISMATCH ON ADVISORY DISPLAY. MAINTENANCE REPLACED FIRST OFFICER'S EADI IAW MTC 9340015. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.