What is the function of aircraft systems that retract spoilers when over-wing exits open?

• A. To enhance aerodynamics
• B. To prevent obstruction during evacuation
• C. To improve fuel efficiency
• D. To increase lift and performance

Answer: (B)

The function of aircraft systems that retract spoilers when over-wing exits open is primarily to prevent obstruction during evacuation. Spoilers are panels on the wing surface that help to reduce lift and increase drag, which can affect the aircraft’s handling during landing and takeoff. However, during an emergency situation where evacuation is necessary, these spoilers can pose a hazard.

By retracting the spoilers, the aircraft ensures a clear and unobstructed pathway for passengers and crew to exit the aircraft quickly and safely through the over-wing exits. This action is crucial in maintaining safety procedures during evacuations, where every second counts in getting people out of the aircraft efficiently and without injury.

Enhancing aerodynamics, improving fuel efficiency, and increasing lift and performance are functions related to the operation of spoilers under normal flying conditions, but they do not directly relate to the need for safe and efficient evacuation protocols, which makes preventing obstruction the primary purpose in this context.