As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICERS AIR DATA COMPUTER FAILED. FIRST OFFICER AIR DATA INSTRUMENT FLUCTUATING, RUDDER RATIO AND AILERON LOCKOUT EICAS MESSAGE DISPLAYED. REPLACED THE FIRST OFFICER AIR DATA COMPUTER. CONFIRMED THE FAULT, UNIT SENT TO THE MANUFACTURER FOR EVALUATION DUE TO PREVIOUS FAILURES.