Aircraft Defueling Methods

Aircraft Defueling Methods

• There are two primary methods for defueling an aircraft: pressure defueling and suction defueling.
• The defuel transfer valve is a crucial component in the defueling process. It's a motor-driven valve that connects the fuel feed manifold and the refueling manifold.
• Pressure defueling is the preferred method due to its efficiency and effectiveness.
• Suction defueling utilizes suction from a fuel tank truck to remove fuel from the aircraft. This method has several drawbacks:
  • It can be challenging to defuel a single tank without impacting other tanks.
  • It's a slower process compared to pressure defueling.
  • Not all fuel tanks are compatible with suction defueling.