What is the main role of the engine shutoff valves?

The main role of the engine shutoff valves is to shut down engine operations in emergencies. These valves are critical safety components designed to quickly interrupt the fuel flow to the engines in situations where continued operation may pose a risk, such as during an engine failure or fire. By closing the shutoff valves, the fuel supply to the engine is stopped, which helps mitigate further hazards, allowing the flight crew to take appropriate emergency actions to ensure the safety of the aircraft and its occupants.

While regulating fuel flow during flight and controlling oil pressure are important functions in aircraft systems, they are not the primary purpose of engine shutoff valves. Enhancing engine performance does not pertain to the function of these valves either, as their focus is purely on safety and emergency response rather than optimizing operation under normal circumstances.