During which scenario is the FIREWALL SHUTOFF HANDLE pulled?

The FIREWALL SHUTOFF HANDLE is designed to cut off fuel flow to the engine in the event of a fire in flight. When a fire is detected, pulling this handle helps contain the fire by preventing the fuel from fueling the flames, thus enhancing safety and giving the pilot a better chance to manage the emergency through appropriate procedures.

In contrast, scenarios like engine failure during flight, uncommanded power changes, and emergency engine shutdown do not specifically necessitate the action of pulling the FIREWALL SHUTOFF HANDLE. While those situations may require other emergency procedures, they do not directly involve shutting off the fuel to combat a fire, which is the primary purpose of the fire wall shutoff mechanism.