A strut (10) for hooking an engine (16) under a wing body assembly
(12) of an aircraft comprises a rigid structure as well as a mechanism for
hooking this structure under the wing body assembly. This mechanism comprises a
front fastener (22), a rear fastener (24) and a structure (26)
for absorbing thrust. To install an engine (16) of greater diameter under
the wing body assembly (12) of an existing plane, the rear part (20b)
of the strut (10) is given a width which increases as it progresses to the
rear. Furthermore, the rear fastener (24) comprises two braces which are
fixed on both sides of the rigid structure and two shackles which connect each
of the braces to an additional transverse rib integrated into the wing body assembly.