As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, RUDDR RATIO ANNUNCIATOR LIGHT ILLUMINATED. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE RESET RUDDER RATIO CHANGER MODULE IAW B767 FIM 27-21 FAULT TREE 804. NO FURTHER DEFECTS NOTED AT THIS TIME. AIRCRAFT RETURNED TO SERVICE.