The invention relates to a data-loading system and a corresponding method for loading software configurations into the electronic components of aircraft, said data-loading system comprising a databank system and a least one transportable data-loading device. Software configurations for at least one fleet of aircraft are stored in the databank system, and said data-loading device is configured to load, via a port, an allocated software configuration that has been obtained from said databank system into a data bus of an aircraft which corresponds to this software configuration. Said data-loading device is configured to load the latest individual software configurations of all of the aircraft of the fleet, from the databank system, and to store these on said data-loading device, this loading process taking place at a ground-based storing position by means of a data connection.