Instrument Rating Checkride Practice Test

Induction icing occurs when ice forms in the engine's induction system, which is the pathway through which air enters the intake manifold. This type of icing typically occurs at temperatures below 0 degrees Celsius (32 degrees Fahrenheit) and at high humidity levels, particularly during flight in visible moisture or cloud conditions.

The formation of ice in the induction system can cause a restriction or blockage in airflow into the engine, leading to reduced engine performance and potential engine failure. This is particularly critical in flight, as it can affect the power output and efficiency of the engine. Pilots must be aware of the conditions that might lead to induction icing and take appropriate precautions, such as using engine anti-ice systems when available or avoiding certain weather conditions.

While other types of icing, such as instrument, structural, and rime icing, involve different areas of the aircraft (like the wings, windshields, or outside surfaces), they do not directly obstruct the air intake system. Therefore, understanding the consequences and management of induction icing is vital for maintaining engine performance during flight.