From which tank(s) can the engines gravity feed?

From which tank(s) can the engines gravity feed?

• A. Wing tanks only
• B. Center tanks only
• C. All tanks
• D. APU tank

Answer: (A)

Gravity feed works when fuel can flow to the engine feeds by the force of gravity, so the tank must be located so its outlet sits above the engine’s fuel line and is connected directly to the engine’s feed path. On the A320, the wing tanks are the only ones that have a direct gravity-fed path to the engine reservoirs, allowing fuel to flow to the engines without the pumps if needed. The center tank and the APU tank are integrated into the system through pumps (boost pumps and crossfeed valves) to deliver fuel to the engines, not by gravity alone. So, fuel drawn by gravity to the engines originates from the wing tanks, while other tanks rely on pumps to feed the engines.

Gravity feed works when fuel can flow to the engine feeds by the force of gravity, so the tank must be located so its outlet sits above the engine’s fuel line and is connected directly to the engine’s feed path. On the A320, the wing tanks are the only ones that have a direct gravity-fed path to the engine reservoirs, allowing fuel to flow to the engines without the pumps if needed. The center tank and the APU tank are integrated into the system through pumps (boost pumps and crossfeed valves) to deliver fuel to the engines, not by gravity alone. So, fuel drawn by gravity to the engines originates from the wing tanks, while other tanks rely on pumps to feed the engines.