Which item is listed as a secondary flight control for trim?

Which item is listed as a secondary flight control for trim?

• A. Aileron/Rudder Trim
• B. MFS
• C. Horizontal Stab Trim
• D. Ground Spoilers

Answer: (A)

Trimming reduces the pilot’s workload by balancing the aircraft so it can fly hands-off. The surface that handles most trim for pitch is the horizontal stabilizer trim, which is the primary trim control. Secondary trim controls exist for other axes, letting you fine‑tune roll and yaw without moving the elevator. Aileron/Rudder Trim fits this role exactly, providing trim adjustments on the ailerons and rudder to balance sideslip or banked flight. That’s why this option is the best answer. The horizontal stabilizer trim is the primary trim surface, not the secondary one; the other choices aren’t trim surfaces used for this purpose.

Trimming reduces the pilot’s workload by balancing the aircraft so it can fly hands-off. The surface that handles most trim for pitch is the horizontal stabilizer trim, which is the primary trim control. Secondary trim controls exist for other axes, letting you fine‑tune roll and yaw without moving the elevator. Aileron/Rudder Trim fits this role exactly, providing trim adjustments on the ailerons and rudder to balance sideslip or banked flight. That’s why this option is the best answer. The horizontal stabilizer trim is the primary trim surface, not the secondary one; the other choices aren’t trim surfaces used for this purpose.