In CUTOFF, the engine start levers close which valves?

In CUTOFF, the engine start levers close which valves?

• A. The related engine and spar fuel shutoff valves
• B. The spar hydraulic valves
• C. The fuel lines
• D. The APU bleed valve

Answer: (A)

When you set the engine start levers to CUTOFF, the system isolates the engine from its fuel supply. This is done by closing the engine fuel shutoff valve and the spar fuel shutoff valve. Closing both cuts off all fuel from reaching the engine, which is essential for safe engine shutdown and for preventing any unrequested fuel flow or ignition while you’re preparing or testing the start sequence. The other items aren’t what these levers control: hydraulic valves govern hydraulic fluids, not fuel; you don’t close the fuel lines themselves with the start lever, you close the fuel shutoff valves; and the APU bleed valve is related to bleed air, not the direct fuel flow controlled by the engine start lever position.

When you set the engine start levers to CUTOFF, the system isolates the engine from its fuel supply. This is done by closing the engine fuel shutoff valve and the spar fuel shutoff valve. Closing both cuts off all fuel from reaching the engine, which is essential for safe engine shutdown and for preventing any unrequested fuel flow or ignition while you’re preparing or testing the start sequence. The other items aren’t what these levers control: hydraulic valves govern hydraulic fluids, not fuel; you don’t close the fuel lines themselves with the start lever, you close the fuel shutoff valves; and the APU bleed valve is related to bleed air, not the direct fuel flow controlled by the engine start lever position.