What was found
ORD - FLT 1734 - ON CLIMB-OUT FROM ORD/YUL, RECEIVED FAULT INDICATION FOR RUDDERS 1 AND 2, YAW DAMPERS 1 AND 2, AND STABILIZER TRIMS 1 AND 2. AIRCRAFT RETURNED TO ORD AND LANDED WITHOUT INCIDENT. REPLACED ACTIVE RUDDER MANIFOLD, REPLACED HIGH PRESSURE SWITCH ON STANDBY RUDDER MANIFOLD, AND REPLACED FLIGHT AUGMENTATION COMPUTER. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)