What is the result of the Pitot Tube becoming blocked during a climb?

When the Pitot tube becomes blocked during a climb, it can lead to an under-reporting of airspeed. This occurs because the Pitot tube measures the dynamic pressure created by the airflow into the tube, which is used to calculate indicated airspeed. If the tube is blocked, it cannot accurately sense the incoming air pressure, leading to erroneous readings.

In a climb, as the helicopter ascends, the true airspeed may actually increase due to a decrease in air density. However, with a blocked Pitot tube, the instrument cannot display this increase correctly, resulting in an airspeed indication that is lower than the actual speed. This is critical for pilots to understand, as inaccurate airspeed readings can potentially affect performance, safety margins, and procedural compliance during flight operations.

The alternatives suggest different scenarios that would result from a blockage, but they do not accurately address the specific consequence of a Pitot tube obstruction during a climb, making the correct response clear.