(1) Remove flexible duct from basket. Straighten out the flex duct and
firmly secure the duct, reducing coupling to a solid object to
prevent swinging. Block off half of the outlet at the aircraft
connector using a metal plate, wood board, or other rigid object
(such as a clipboard), using C-clamps or the like to simulate the
resistance in the aircraft. Secure the end of the ducts to prevent
them from whipping