As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER RATIO LIGHT AND EICAS MESSAGE AFTER ENGINE START. BTB AND GROUNDED. RIGHT YAW DAMPER MODULE FAULTED LEFT HYD SWITCH. REMOVED AND REPLACED S27 HYD PRESS SWITCH, IAW B767 AMM 27-11-17. OPERATIONS AND LEAK CHECK GOOD. RAN ENGINE, IAW B767-10A. NO DEFECTS NOTED.