How is emergency fuel jettisoning typically accomplished?

The process of emergency fuel jettisoning is commonly accomplished through a system designed for efficiency and safety, which typically utilizes a common manifold and outlet located in each wing. This method allows fuel to be rapidly discharged from the aircraft during an emergency, especially when quick reductions in weight are necessary, such as during an aborted landing or if the aircraft is overweight for a safe landing.

By using a common manifold system, the fuel can be jettisoned from multiple fuel tanks simultaneously, speeding up the process and ensuring that the aircraft reaches a safe landing weight in the shortest time possible. This method helps maintain stability and control during the jettisoning process, as the fuel is released evenly from both wings, minimizing any changes in the aircraft's balance.

Other methods, like releasing fuel from individual tanks or using manual pumps, are less efficient and could result in an uneven distribution of weight, which is not ideal in an emergency situation. Venting fuel through the engine is also not a viable option as it could pose serious safety risks and would not accomplish the goal of weight reduction effectively. Thus, the use of a common manifold and outlet is the safest and most effective method for emergency fuel jettisoning.