What is the engine cool down time required prior to shutdown?

The correct answer is 2 minutes because this duration allows for the engines to cool down adequately before shutdown, preventing potential damage caused by temperature fluctuations. During this time, the oil circulates and helps to dissipate heat from the engine components, which is critical for maintaining engine reliability and longevity. Following this procedure is essential as it ensures that the engine is not exposed to abrupt temperature drops, which can lead to thermal stress and subsequently, engine failure.

Having a proper engine cool down time is standard practice in aviation maintenance protocols and is also aligned with manufacturer recommendations for the specific aircraft type in question, ensuring consistent performance and safety.