As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE 'RUD RATIO SNGL' EICAS ADVISORY MESSAGE DISPLAYED. UPPER OR LOWER RUDDER RATIO FUNCTION FAIL. 10-9-07 REPLACED WITH NEW RUDDER RATIO CHANGER ACTUATOR PER MM27-21-12. PERFORMED CMC TEST. RUDDER RATIO CHANGER PASSED AND MSG GONE. A/C RETURNED TO SERVICE.