Which component is responsible for initiating engine shutdown during an overspeed condition?

Which component is responsible for initiating engine shutdown during an overspeed condition?

• A. Fuel pump
• B. Starter motor
• C. VARTOMS
• D. Overspeed solenoid valve

Answer: (D)

When an engine overspeeds, the system must cut fuel quickly to stop the engine and prevent damage. The device that actually enforces the shutdown is the overspeed solenoid valve. When it receives the trip signal, it interrupts the fuel supply to the engine, causing an immediate shutdown. Other components play different roles: the fuel pump simply delivers fuel and doesn’t terminate operation; the starter motor is used only for starting, not stopping; and VARTOMS is a monitoring/trip system that may detect overspeed but does not by itself shut off fuel—the solenoid valve is the active shutdown actuator.

When an engine overspeeds, the system must cut fuel quickly to stop the engine and prevent damage. The device that actually enforces the shutdown is the overspeed solenoid valve. When it receives the trip signal, it interrupts the fuel supply to the engine, causing an immediate shutdown. Other components play different roles: the fuel pump simply delivers fuel and doesn’t terminate operation; the starter motor is used only for starting, not stopping; and VARTOMS is a monitoring/trip system that may detect overspeed but does not by itself shut off fuel—the solenoid valve is the active shutdown actuator.