Mechanical back-up control allows mechanical input to control the ______, and the ______.

Mechanical back-up control allows mechanical input to control the ______, and the ______.

• A. Rudder; THS
• B. Rudder; Ailerons
• C. Elevator; THS
• D. Ailerons; Elevators

Answer: (A)

Mechanical back-up control is about providing a direct mechanical link from the cockpit to certain control surfaces when the normal fly-by-wire/hydraulic system isn’t available. It is designed to let the pilot influence the aircraft’s stability via rudder and the tail horizontal stabilizer (THS) to maintain safe flight in degraded conditions. The rudder handles yaw control, while the THS adjusts pitch trim, giving basic directional stability and longitudinal trim without relying on the primary electronic/h hydraulic controls. Direct mechanical input to the ailerons or the elevator isn’t part of this backup path, so those surfaces aren’t controlled mechanically through the back-up system.

Mechanical back-up control is about providing a direct mechanical link from the cockpit to certain control surfaces when the normal fly-by-wire/hydraulic system isn’t available. It is designed to let the pilot influence the aircraft’s stability via rudder and the tail horizontal stabilizer (THS) to maintain safe flight in degraded conditions. The rudder handles yaw control, while the THS adjusts pitch trim, giving basic directional stability and longitudinal trim without relying on the primary electronic/h hydraulic controls. Direct mechanical input to the ailerons or the elevator isn’t part of this backup path, so those surfaces aren’t controlled mechanically through the back-up system.