What was found
RUDDER SYSTEM 1-2 INOP, YAW DAMPER FAILED, AND AUTOPILOT FAIL EICAS MESSAGE DISPLAYED. RAN QRH RUDDER 1-2 INOP MESSAGE PERSISTED. PERFORMED T/S IRT FIM 27-22-00-804-A STEPS 1-2, 9 THRU 19, FOUND TO BE TRANSITORY. AIRCRAFT OK FOR SERVICE.