What happens to the rudder boost system when the ENVIR switch is turned off?

When the ENVIR switch is turned off, the rudder boost system disengages. This system is designed to assist the pilot with rudder authority, especially in conditions where additional force is needed to maneuver the aircraft effectively. The boost typically provides enhanced control by making it easier to operate the rudder pedals.

By turning the ENVIR switch off, the system is effectively deactivated, which means that any hydraulic assistance provided by the rudder boost is no longer available. This situation requires the pilot to exert more manual effort to control the rudder, which can impact handling, particularly in critical flight situations. Understanding this aspect is essential for pilots to ensure they can manage the aircraft’s control surfaces appropriately, especially in instances where the boost system may ordinarily provide significant assistance.