The structure element (14) extends along a longitudinal direction and comprises an external casing (15A) defining a continuous closed section. It comprises a transverse rigidifying core (15B) located inside the casing and connecting opposite points of the ...

The releasable linking unit (10) has a hook control portion that has a guide mechanism for guiding a hook between locked position and unlocked position. The guide mechanism is designed to bias two supports against one another when the hook is fully displac...