Where is the firewall shutoff valve located?

The firewall shutoff valve is primarily located between the air separator and the firewall. This placement is crucial for the safe operation of the aircraft as it allows for immediate shutoff of fuel flow to the engine in case of an emergency or malfunction. The valve's position is designed to isolate the engine from the fuel system to prevent potential fire hazards and ensure that fuel leaks do not spread to the cockpit or passenger areas in the event of a failure. Operating procedures regarding this valve are critical in maintaining safety standards during Part 135 operations, making it imperative to understand its location and function.

Placing the shutoff valve at the fuel pump or near the fuel vent would not provide the same level of protection, as these locations do not adequately address the risks associated with fuel lines running towards the engine. The fuel tank without proper isolation could still pose a risk in the event of a fire or malfunction, while the air separator plays a vital role in the fuel system’s pressure management, underscoring the importance of its relationship to the firewall shutoff valve.