Commercial Pilot License (CPL) Practice Exam

An unintentional spin is most likely to occur during a crossed controlled turn from base to final approach. This is because such a turn can often lead to a situation where the aircraft is subjected to a high angle of bank and reduced airspeed. In a scenario with a significant cross-control input, if the pilot does not maintain sufficient control or if the aircraft enters a stall, the loss of lift on the wings can lead to one wing dropping, resulting in a spin.

In contrast, performing an engine check at cruising altitude generally does not involve maneuvers that would cause a spin, as the aircraft is likely operating above stall speed in straight and level flight. Climbing steadily after takeoff typically maintains adequate airflow over the wings, preventing stall and unwanted spins. Lastly, executing a precision landing involves careful speed and configuration management, which minimizes the risk of entering a stall or a spin. Thus, the conditions during a cross-controlled turn present the most risk for an unintentional spin.