To avoid simultaneous flame out of both engines, the forward main tank is connected to the supply tanks by two overflows installed at different heights to avoid which condition?

• A. Engine stall / Pumps
• B. Overheat / Turbines
• C. Fuel starvation / Tanks
• D. Flame out / Engines

Answer: (D)

The main idea here is redundancy in fuel delivery using gravity head. Having two overflow paths from the forward main tank to the supply tanks, placed at different heights, creates two separate fuel pressures feeding the engines. If fuel level changes or one feed path is compromised, the other path at the different height can still push fuel to the engines, so both don’t lose fuel at the same time. A flameout happens when an engine stops getting enough fuel to burn, so maintaining a continuous, reliable fuel supply to both engines helps prevent simultaneous flameouts. This setup isn’t mainly about preventing stalls or overheating; it’s about ensuring one feed path can keep fueling the engines even if the other is disrupted.