Aeroplane structure comprising a cut wire detector, said detector comprising a conductor wire mechanically secured to the aeroplane structure to be monitored, said conductor wire being fed electrically at one end and restoring, at another end, a current and/or an electrical voltage corresponding to the power supply, if the aeroplane structure to be monitored has not undergone unacceptable deterioration, characterized in that said detector comprises: - two networks (6, 7) of conductor wires extending respectively on a planar support in a direction of space different from that in which the other network extends, - the support being secured to the aeroplane structure so as to undergo the deformations and the breaks of said aeroplane structure, - one network being powered by a mains electrical power supply by a terminal, and the other network being powered by a mains electrical power supply by a separate terminal, such that the two networks are powered separately, - all the wires of one network (6, 7) of wires being connected to the mains electrical power supply to which they belong, - the two networks (6, 7) extending in sheets, with parallel wire portions, - wire portions (8, 9, 10, 11) of one network (6, 7) being oriented in a direction orthogonal to that of the portions of the other network (1, 27, 28, 29), - the two networks (6, 7) forming a comb pattern in which useful connections of one network comprise parallel portions (1, 27, 28 and 29) and in which useful connections of the other network comprise parallel portions (8, 9, 10, 11)) linked, by right-angle bends and return connections, to a set of terminals aligned with the terminals of the read connections of the other network, so as to estimate the length and the position of the deformation or of the break of the aeroplane structure, in case of the cutting of at least one of the wire portions; and, the cut wire detector further comprising: - a parallel connection of the conductor wires of a network, - a microprocessor and a program memory measuring, successively in time, electrical potentials and/or currents available on each of the conductor wires of a network that is operating, - a decoder controlled by the microprocessor, - the microprocessor implementing an equivalent resistance measurement program, to deduce therefrom the position of the deterioration. - two networks (6, 7) of conductor wires extending respectively on a planar support in a direction of space different from that in which the other network extends, - the support being secured to the aeroplane structure so as to undergo the deformations and the breaks of said aeroplane structure, - one network being powered by a mains electrical power supply by a terminal, and the other network being powered by a mains electrical power supply by a separate terminal, such that the two networks are powered separately, - all the wires of one network (6, 7) of wires being connected to the mains electrical power supply to which they belong, - the two networks (6, 7) extending in sheets, with parallel wire portions, - wire portions (8, 9, 10, 11) of one network (6, 7) being oriented in a direction orthogonal to that of the portions of the other network (1, 27, 28, 29), - the two networks (6, 7) forming a comb pattern in which useful connections of one network comprise parallel portions (1, 27, 28 and 29) and in which useful connections of the other network comprise parallel portions (8, 9, 10, 11)) linked, by right-angle bends and return connections, to a set of terminals aligned with the terminals of the read connections of the other network, - a parallel connection of the conductor wires of a network, - a microprocessor and a program memory measuring, successively in time, electrical potentials and/or currents available on each of the conductor wires of a network that is operating, - a decoder controlled by the microprocessor, - the microprocessor implementing an equivalent resistance measurement program, to deduce therefrom the position of the deterioration.