the apparatus , for an aircraft comprising a platform provided with balls for receiving loads in the region of a lateral door , comprises a foldable rolling track , a device for shifting the rolling track transversely of the luggage compartment , in synchronism with the opening of the door , from a first folded storage position in the luggage compartment in the region of the door to a second folded position entirely outside the aircraft in which it is articulated by one end to the threshold of the door , and vice versa , guide devices which are carried by the platform and in which the rolling track is guidedly mounted , devices for lowering and raising the rolling track in the second position , and a pulling device connected to the platform .