What is the limitation for the usage of ground spoilers on the Envoy 175?

The limitation regarding the usage of ground spoilers on the Envoy 175 specifies that they must not be extended above 25 knots during landing. This restriction is crucial because ground spoilers are designed to decrease lift and increase drag primarily when the aircraft is on the ground, facilitating a quicker deceleration. Extending them at speeds above 25 knots can lead to destabilization during landing, potentially affecting the aircraft's control and performance as it touches down.

Maintaining this limit ensures that the aircraft remains stable and controllable, as extending ground spoilers at too high a speed may disrupt airflow over the wings and lead to unintended aerodynamic consequences. This operational restriction plays a key role in enhancing safety during landings, enabling the pilots to manage the aircraft's performance effectively as it transitions from the air to the ground.

Other choices suggest scenarios that either do not provide appropriate guidelines for safe operations or impose requirements that could negatively impact a successful landing. For instance, allowing the use of ground spoilers at any speed could compromise control effectiveness, whereas requiring them to be extended at all times or at speeds lower than 25 knots does not align with optimal aerodynamic practices during landing.