What is a potential issue if cowl flaps are not adjusted correctly?

When cowl flaps are not adjusted correctly, one of the main issues that can arise is higher cylinder head temperatures. Cowl flaps are designed to regulate the airflow over the engine and its components. When they are closed, they restrict airflow, which can lead to insufficient cooling of the engine and subsequently, an increase in cylinder head temperatures. Proper adjustment of the cowl flaps allows for optimal air circulation, enhancing cooling efficiency and ensuring that the engine operates within safe temperature limits.

If the cowl flaps are left fully closed or improperly positioned for the current phase of flight, engine temperatures can climb beyond normal operating ranges. This can lead to engine overheating, which poses a risk of damage and can affect engine performance. Maintaining the correct position of the cowl flaps is crucial for effective engine cooling, especially during high-power settings or prolonged climbs when the engine generates more heat.