How is fuel directed to the collector tank from each wing tank?

Fuel is directed to the collector tank from each wing tank through the operation of two transfer jet pumps. These pumps utilize the Venturi effect to draw fuel from the wing tanks into the collector tank. When fuel is withdrawn from the collector tank, it creates a low-pressure area that allows fuel from the wing tanks to flow towards the collector tank, ensuring that the engine has a continuous supply of fuel, even when the aircraft is in various attitudes.

The use of transfer jet pumps is essential as they provide a fuel transfer mechanism that relies on engine-driven pressure and are less reliant on electrical systems, making them reliable during various flight conditions. This efficient transfer helps maintain the necessary fuel supply and balance during flight operations.

While the electric boost pump does assist in certain conditions, particularly during engine starts or low fuel situations, it is not the primary means of transferring fuel from the wing tanks to the collector tank. Similarly, the primary jet pump is not specifically tasked with transferring fuel from the wing tanks to the collector tank, and the collector tank pressure pump functions to send fuel to the engine rather than transfer it from the wing tanks. Thus, the two transfer jet pumps are the correct mechanism for directing fuel from the wing tanks to the collector tank.