36 are converted from analog alternating voltage signals to digital signals the first inductive coupling element 36 comprises a connection to the electronics unit 44 which is furthermore designed to emit data relating to the type of the particular equipment module according to an embodiment of the invention by way of the first inductive coupling element 36 to the second inductive coupling element 40 so that the aircraft can become aware of the equipment state of the equipment module according to an embodiment of the invention apart from the type of equipment module the equipment state can also comprise its weight power consumption and the like if the equipment module is to be temperature controlled the data transmitted can also include a temperature an equipment module moved into the cargo space 6 is equipped by way of a pivotally held retaining means 45 with a roller 49 and a hook shaped projection 47 that is arranged so as to be largely perpendicular to it wherein the retaining means 45 is held on a structurally fixed part of the cargo space 6 with an arrangement in a position in which the roller is situated so as to be parallel to the floor area 8 displacement of an equipment module along its hook shaped projection 47 can be carried out this means that the projection 47 also serves as a guide means or travel limitation means by pivoting the.