What does the AUTO position on the FUEL BOOST switch indicate?

The AUTO position on the FUEL BOOST switch indicates that the standby fuel pump operates automatically during specific phases of flight, particularly during APU or engine start. This setting allows the pump to engage only when necessary to ensure that the engines receive adequate fuel for starting without the constant operation of the pump, which can lead to wear or unnecessary fuel consumption.

When the switch is set to AUTO, the system intelligently controls the activation of the standby pump depending on the operational needs, contributing to both safety and efficiency. This means that in normal cruise conditions or when the engines are already running, the pump will not be activated unless required, making it a more efficient choice.

Understanding this function is crucial for the management of the fuel system in the Dassault Falcon 7X, as it reflects how the aircraft balances safety with operational efficiency. Other options may imply a continuous operation or emergency states but do not accurately describe how the AUTO position is meant to function.