Under what condition will the avionics system be in the closed configuration on the ground?

The closed configuration of the avionics system on the ground is primarily associated with cold skin temperatures. When the aircraft is on the ground and the skin temperatures of the aircraft are low, it indicates that the avionics might not be adequately warmed up. In such conditions, the system will automatically switch to a closed configuration to conserve energy and protect sensitive components from potential thermal stress.

This configuration helps to prevent overheating or unnecessary operation of systems that may not be needed during colder ground conditions. It reflects the aircraft's ability to manage its systems efficiently based on external temperature influences, ensuring reliability and longevity of onboard electronic components.

In other conditions, such as warm skin temperatures or during idle power, the avionics might not initiate this closed configuration, as the system is designed to operate differently based on the surrounding thermal environment. Similarly, windy conditions do not directly dictate the operation of the avionics system, making them less relevant in this context.