Aircraft engine pylon having a movable assembly of cowls

An engine pylon of an aircraft, the engine pylon comprising:

• a support structure having a front portion and a rear portion, the support structure being configured for fixing an engine and a wing of the aircraft to one another;
• a front aerodynamic cowling formed by an assembly of front cowls, wherein the front aerodynamic cowling is fixed around the front portion of the support structure of the engine pylon;
• a rear aerodynamic cowling comprising:
• an assembly of two rear cowls which are disposed around the rear portion of the support structure of the engine pylon, wherein:
• each rear cowl has an approximately triangular shape;
• an upper edge of the approximately triangular shape is configured to run along the wing;
• a lower edge of the approximately triangular shape follows along a lower portion of the rear portion;
• and
• a front edge of the approximately triangular shape connects the upper edge and the lower edge at a front of the rear portion;
• each rear cowl has:
• an upper fixed cowl secured to the rear portion;
• and
• a lower movable cowl mounted articulated on the rear portion, between an open position and a closed position;
• wherein the upper fixed cowl and the lower movable cowl are separated by a separation line which is generally parallel to the upper edge;
• wherein, in the closed position, the two lower movable cowls are moved close to one another and to the rear portion such that the lower edges of the two lower movable cowls are contiguous with each other and constitute a trailing edge of the engine pylon;
• and
• wherein, in the open position, the two lower movable cowls are tilted such that the lower edges of the two lower movable cowls are moved away from one another;
• for each lower movable cowl, a hinge system fixed between the lower movable cowl and the rear portion;
• and
• at least one locking system which locks the two lower movable cowls to one another in the closed position;
• wherein the at least one locking system has, for each lower movable cowl:
• a boss secured to the lower movable cowl, the boss having a bore formed therein;
• a recess made in the rear portion to receive the boss in the closed position;
• and
• a connecting pin which is fixed through the bore.