The rudder system gives yaw control of the aircraft. The rudder system is hydraulically operated by three independent hydraulic systems through three power control units (PCUs). It is mechanically controlled by pilot's and copilot's inputs through control cables and rods. The rudder system includes the systems that follow:

• Rudder Control System
• Rudder Trim System
• Rudder Travel-Limiting System

The pilot and copilot rudder pedals give rudder control through a series of cables, pulleys and mechanical linkages. Three independently operated power control units (PCUs) move the rudder control surface. The PCUs are mechanically controlled and hydraulically operated.

A single rudder control surface attached to the empennage gives yaw control to the aircraft. The rudder control system includes anti-jam mechanisms and yaw dampers. The yaw dampers give protection to the aircraft from the yaw oscillations and get their input from the automatic flight control system. An anti-jam mechanism makes sure that a jam in the cable circuit does not stop rudder control movement.

A rudder trim switch (RUD TRIM) installed on the center pedestal gives rudder trim. The automatic flight control system also gives rudder control. The position indication for the rudder shows on the EICAS.