Private Pilot License (PPL) Flight Test Ground Practice Test

The correct action when the static port becomes blocked during flight is to use an alternate static source. The static port is essential for providing accurate atmospheric pressure readings to the altimeter and the vertical speed indicator, among other instruments. If it becomes obstructed, the instruments that rely on static pressure can provide incorrect readings, potentially leading to dangerous situations.

By utilizing an alternate static source, which is typically a different opening on the aircraft that can provide a more accurate pressure reading, pilots can restore functionality to their altitude and airspeed instruments. This action ensures that the pilot can continue to navigate safely and keep the aircraft within safe operating parameters.

In circumstances where the static system is compromised, maintaining level flight using the control yoke, activating autopilot, or reducing throttle to idle would not address the root issue of the blocked static port and could lead to a lack of accurate information necessary for safe flight operations.