As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BLOCK OUT AND LT & RT ENGINES STARTED, RUDDER RATIO EICAS CAUTION MESSAGE APPEARED. ACFT RETURNED TO GATE AND MTX GROUNDED ACFT . MTX RESET LT & RR RUDDER RATIO MODULE AND PERFORMED ENGINE RUNS AND NO RUDDER RATIO FAULT IAW FIM 27-09 FT 814 AND AMM 71-00-00 OPS CHECK GOOD ACFT RELEASED ETOPS 180. AND RETURNED ACFT TO SERVICE.