Where should cowl flaps be positioned during ground operations?

During ground operations, cowl flaps should be positioned fully open to promote effective engine cooling. This is crucial because, at idle speeds or during taxi, the airflow through the engine compartment is significantly reduced compared to when the aircraft is in flight. By fully opening the cowl flaps, you increase the amount of air that passes over the engine components, helping to dissipate heat that builds up during ground operations.

Proper management of engine temperatures is essential to maintain engine performance and avoid overheating. While crewmembers may consider other factors like engine temperature or specific operating procedures, fully open cowl flaps are the standard practice in this scenario to ensure adequate cooling is achieved.