As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'RUD RATIO SNGL' EICAS ADVISORY MESSAGE DISPLAYED. UPPER OR LOWER RUDDER RATIO FUNCTION FAIL. UPPER RUDDER RATIO ACTUATOR REPLACED WITH SERVICEABLE RUDDER RATIO ACTUATOR IAW 27 21 12 FUNCTIONAL CHECK CARRIED OUT, ALL OPERATIONS NORMAL.