What is the recommended speed for single-engine approach and landing?

The recommended speed for a single-engine approach and landing in the King Air 350 is 115 KIAS. This speed provides a suitable margin for performance and control under challenging situations, such as when operating with one engine inoperative. At 115 KIAS, the aircraft maintains adequate lift and control authority, allowing for a stable approach.

Additionally, this speed helps manage the aircraft's stall margin effectively while ensuring that the landing gear and flaps can be safely deployed at the appropriate points during the landing sequence. Operating at this speed strikes a balance between responsiveness and safety, helping ensure that the pilot can execute the landing successfully while maintaining the necessary control of the aircraft.

Other speeds listed in the options may not offer the same level of control or may create risks associated with lower or higher margins for performance and stall conditions. Therefore, 115 KIAS is established as the optimal approach speed under single-engine conditions for the King Air 350.