When operating in ice conditions, what is the required approach speed with flaps set at 15º?

When operating in icy conditions, it's crucial to consider an appropriate approach speed to ensure safe flight and landing. Setting the flaps at 15º affects the aircraft's stall speed and overall performance, especially in adverse weather conditions such as icing. The required approach speed at this configuration accounts for the additional drag and reduced lift characteristics associated with ice on the wings, which can impede performance and handling.

Choosing 105 knots as the required approach speed is correct because it aligns with safety protocols that account for the performance limitations that could occur in ice. This speed provides a buffer above the stall speed to ensure that the aircraft remains controllable and capable of responding effectively during the landing phase, even if additional factors like wind shear or turbulence come into play.

In contrast, speeds that are too low could increase the risk of stalling, particularly in an ice-laden environment, making the selection of 105 knots a prudent measure for maintaining aircraft control while minimizing the risks associated with ice accumulation.