How do spoilers deploy during approach and landing?

During approach and landing, spoilers are primarily deployed symmetrically to assist in reducing lift and increasing drag as the aircraft descends and lands. This symmetrical deployment helps control the aircraft's descent rate and allows for a smoother landing while maintaining stability in flight. By deploying both left and right spoilers at the same time, pilots can ensure that the aircraft remains level and controlled, minimizing the risk of unintentional yaw or roll that could occur with uneven lift distribution.

In this stage of flight, the primary goal is to safely manage the descent and touchdown of the aircraft. Symmetrical deployment of the spoilers ensures that the lift is evenly reduced, which is essential for maintaining a predictable flight path during these critical phases. While there are scenarios where asymmetrical deployment can be beneficial for roll control—such as during certain maneuvers—it is not the standard practice during approach and landing, as this could adversely affect stability.

Therefore, the emphasis during approach and landing is on symmetrical spoiler deployment to support safe and effective landings.