Propulsion assembly comprising an engine attachment that is compact in terms of height, aircraft comprising at least one such propulsion assembly

A propulsion assembly comprising:

• an engine;
• a pylon which comprises a primary structure having a front end;
• and
• at least one engine attachment which connects the engine and the front end of the primary structure and comprises
• a transverse beam, a first removable connection connecting the transverse beam and the primary structure, and a second connection connecting the transverse beam and the engine,
• wherein the first removable connection has
• a first contact surface integral with the transverse beam,
• a second contact surface integral with the primary structure,
• at least one connection element keeping the first contact surface and the second contact surface pressed against one another, and
• at least one system for transmission of transverse forces configured to transmit forces, oriented essentially in a vertical direction, between the engine and the primary structure, and
• wherein the first removable connection further comprises
• at least one waiting fail-safe connection distinct from the at least one connection element and configured to generate an additional path for forces only in an event of malfunction of an element of the first removable connection, wherein the at least one waiting fail-safe connection comprises at least one first shape integral with the transverse beam and projecting relative to the first contact surface and at least one second shape integral with the primary structure, hollow relative to the second contact surface and configured to house the at least one first shape,
• wherein the at least one first shape and the at least one second shape interact with one another and having at least one spacing therebetween in the vertical direction, and
• wherein the at least one first shape comprises a first trapezoidal contour which has an upper edge and a lower edge substantially parallel to one another and perpendicular to the vertical direction, and oblique edges connecting the upper edge and the lower edge.