Which spoiler panel on each wing is designated for ground spoiler use only?

Which spoiler panel on each wing is designated for ground spoiler use only?

• A. Inboard panel
• B. Midboard panel
• C. Outboard panel
• D. All panels

Answer: (A)

Ground spoilers are lift-dump devices activated on touchdown to maximize braking by reducing wing lift. The inboard panel on each wing is designated for ground spoiler use only because it provides the most effective lift reduction with the least impact on roll control and wing structural loads during landing. Its deployment is tied to weight-on-wheels sensing, so it typically arms automatically when the airplane is on the ground, often coordinated with braking. The other panels are used primarily as flight spoilers or speed brakes in the air and can affect aileron authority if deployed on the ground, so they aren’t designated for ground use only.

Ground spoilers are lift-dump devices activated on touchdown to maximize braking by reducing wing lift. The inboard panel on each wing is designated for ground spoiler use only because it provides the most effective lift reduction with the least impact on roll control and wing structural loads during landing. Its deployment is tied to weight-on-wheels sensing, so it typically arms automatically when the airplane is on the ground, often coordinated with braking. The other panels are used primarily as flight spoilers or speed brakes in the air and can affect aileron authority if deployed on the ground, so they aren’t designated for ground use only.