What is the recommended approach speed with flaps at 5 during landing?

The recommended approach speed with flaps set to 5° during landing for the King Air 350 is typically around 125 KIAS. This speed provides a balance between being slow enough to allow for safe and controlled descent while also ensuring the aircraft maintains adequate airflow over the wings for stability and control. At this approach speed, pilots can effectively manage descent rates and have sufficient margin above stall speeds, which is critical in the landing phase where precision and safety are paramount.

Choosing this approach speed allows for better handling characteristics, especially in crosswind situations or if the aircraft encounters turbulence during the final approach. It's important for pilots to be aware of the specific aircraft performance charts found in the operating handbook, which provide precise speeds for various flap configurations.

The other options provided may either be too fast or too slow for optimal control and handling during the landing phase, potentially affecting the landing performance and safety.