A method for loading data into computer processor units (100 i) from a data source, with a data loading device comprising at least a first connector for connecting to the data source and provided with a PHY component, and a plurality of second connectors for connecting to the computer processor units (100 i) and each provided with a respective PHY component, the first connector being connected to the second connectors by a first selector module in order to define a single down channel so as to transmit data from the first connector to each of the second connectors (20 i) individually, and by a second selector module for defining a single up channel so as to transmit data in the opposite direction, the first and second selector modules (40, 50) being arranged to be capable of connecting only one of the second connectors at a time to the first connector and the device including a control unit for controlling the selector modules to select which second connector to connect to the first connector as a function of an identifier of the PHY component to which each connector is connected, the device comprising a chassis having mounted thereon the selector modules (40, 50), the first connector, and the second connectors; the control unit comprising a local control unit and a remote control unit connected by a cable to the local control unit and provided with a man/machine interface (91, 92) and the remote control unit comprising a memory containing a table associating each second connector with at least a transfer rate of a computer unit (100 i) connected the second connector; characterized in that the method comprises: when the remote control unit is switched on by an operator, the remote control unit verifies that the aircraft is stationary, and where appropriate, switching on the power to the local control unit and load the table in the local control unit; the remote control unit then displays a menu proposing updating the computer units (100 i) with the possibility for the operator of selecting a computer unit (100 i) for updating; the operator chooses the computer unit (100 2) and connect a computer unit on the first connector the remote control unit then sends an instruction to the local control unit to link the computer unit (100 2) to the data source; the local control unit returns an acknowledgment to the remote control unit and controls the selector units (40, 50) so as to connect the PHY component of the first connector to the PHY component of the selected second connector (20 2) in compliance with the content of the table that it has in memory, the transfer rate is set to the value that appears in the table, or if the selected computer unit (100 2) cannot communicate at that transfer rate, a negotiation is undertook in order to determine a lower transfer rate; set up an up channel and a down channel between the PHY components of the first connector and of the second connector (20 2) at the stored transfer rate or at the automatically negotiated rate; the computer unit caused the update data to be transmitted, the data being copied unchanged from one PHY component to another without decode them; at the end of the update of the computer unit (100 2), the operator indicates to the remote control unit, by the man/machine interface, either the stop of the update or the selection of another computer unit. when the remote control unit is switched on by an operator, the remote control unit verifies that the aircraft is stationary, and where appropriate, switching on the power to the local control unit and load the table in the local control unit; the remote control unit then displays a menu proposing updating the computer units (100 i) with the possibility for the operator of selecting a computer unit (100 i) for updating; the operator chooses the computer unit (100 2) and connect a computer unit on the first connector the remote control unit then sends an instruction to the local control unit to link the computer unit (100 2) to the data source; the local control unit returns an acknowledgment to the remote control unit and controls the selector units (40, 50) so as to connect the PHY component of the first connector to the PHY component of the selected second connector (20 2) in compliance with the content of the table that it has in memory, the transfer rate is set to the value that appears in the table, or if the selected computer unit (100 2) cannot communicate at that transfer rate, a negotiation is undertook in order to determine a lower transfer rate; set up an up channel and a down channel between the PHY components of the first connector and of the second connector (20 2) at the stored transfer rate or at the automatically negotiated rate; the computer unit caused the update data to be transmitted, the data being copied unchanged from one PHY component to another without decode them; at the end of the update of the computer unit (100 2), the operator indicates to the remote control unit, by the man/machine interface, either the stop of the update or the selection of another computer unit.