What components does a fuel dump system typically lack?

A fuel dump system is primarily designed to release excess fuel from an aircraft in specific situations, such as during an emergency or when a reduction in weight is necessary, typically before landing. The components involved in such a system primarily include valves and lines that facilitate the controlled release of fuel.

In this context, flow meters and tanks are not standard components of a fuel dump system. Flow meters would measure the rate of fuel being dumped, which is not typically necessary for the function of the fuel dump system since the goal is simply to remove fuel rather than manage precise measurements. Similarly, dedicated tanks for storing the dumped fuel are not part of the system, as the purpose is to release the fuel directly into the air rather than collect or store it after dumping.

Therefore, the absence of flow meters and tanks from a fuel dump system makes this the correct identification of what such systems typically lack.