CTS Winter Operations Practice Test – Prep, Questions & Study Guide

When ice blocks the pitot tube, it disrupts the flow of air into the tube, which is crucial for measuring dynamic air pressure. This pressure is used to determine airspeed. As a result, pilots may experience fluctuating or inaccurate airspeed readings, which can lead to confusion and difficulties in maintaining the correct flight profile. Accurate airspeed is essential for safe flight; incorrect readings can affect flight operations and decision-making, potentially resulting in dangerous flying conditions.

In this scenario, while blocking the pitot tube primarily affects airspeed measurement, it does not directly impact altitude recording, engine performance, or control surface effectiveness in the same fundamental manner. Thus, the most direct and significant consequence of ice blocking the pitot tube is the fluctuation in airspeed readings.