A clock synchronizing method is provided. After a fan is removed therefrom such that the machining tool is rotatable about an engine axis of rotation in conjunction with rotation of the LPTfan rotor shaft assembly. An aerodynamic skirt kit comprising a skirt panel having a curved shape adapted to cooperate with an exterior circumference of a wheel of the trailer; and a plurality of struts adapted to secure the skirt panel to a trailer is equally provided.