During a flaps full landing rollout with the spoilers deployed, what occurs if the speed brake handle is manually moved aft?

When the speed brake handle is manually moved aft during a flaps full landing rollout with the spoilers deployed, all the spoiler panels retract. This is an important operational feature designed to help manage the aircraft's lift and drag. When the speed brake is engaged, it creates additional drag to aid in deceleration after landing. However, if the speed brake handle is moved to the aft position, it commands the retraction of all spoiler panels, thereby reducing any drag and lift created by the spoilers.

This behavior is particularly significant during landing phases because the proper control over lift and drag is essential for maintaining stability and ensuring safe deceleration. The design of the A320’s spoiler system allows pilots to have fine control over the extension and retraction of spoiler panels to adapt to flight conditions and landing scenarios effectively.