How does the oil-fuel heat exchanger prevent ice formation?

The correct choice highlights the function of the oil-fuel heat exchanger in preventing ice formation by utilizing heat from the accessory gearbox scavenger oil. This system is designed to transfer heat from the engine oil to the fuel, ensuring that the fuel is kept above freezing temperatures. By effectively warming the fuel, the heat exchanger mitigates the risk of ice crystals forming within the fuel system, which can occur when fuel temperatures drop too low.

This is especially critical in aviation operations, as fuel systems can be prone to freezing, particularly in cold weather or high-altitude scenarios. Maintaining a suitable fuel temperature helps ensure that the fuel remains in a liquid state, ready for proper combustion and engine performance.

Other approaches, such as cooling the fuel or adding additives like alcohol, are not the primary means by which the heat exchanger operates to prevent ice formation. The technology focuses on the transfer of heat from engine oil to enhance fuel temperature stability directly.