Final answer:
Avionics overheat protection can be achieved by turning on the AVIONICS COOL ORIDE system while using ground A/C. This system allows cool air to flow into the avionics bay and dissipate the heat generated by the avionics equipment turned ON to allow the flow of cool air into the avionics bay.
Step-by-step explanation:
Avionics overheat protection refers to the systems in place to prevent avionics components from overheating. When ground air conditioning (ground A/C) is available, it can be used to cool the avionics. However, the AVIONICS COOL ORIDE system needs to be turned ON for this to happen.
AVIONICS COOL ORIDE is a feature that allows cool outside air to flow into the avionics bay and cool the avionics components. It works by opening the avionics cooling valve, which allows ambient air to enter the avionics bay and dissipate the heat generated by the avionics equipment. Therefore, to have avionics overheat protection while using ground A/C, the AVIONICS COOL ORIDE system should be turned ON to allow the flow of cool air into the avionics bay.