As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED RUDDER RATIO LIGHT AND EICAS MESSAGE. TROUBLESHOT IAW FIM TASK 27-21-00 FIG 104. REPLACED LEFT ELECTRICAL HYD PUMP CONTROL PRESSURE SWITCH S27 IAW AMM. 'HYD SWITCH' FAULT CLEARED ON RIGHT YAW DAMP MODULE. 'RUDDER RATIO' LIGHT AND EICAS MESSAGE CLEARED.