The project SALI follows the activities connected with the integrated project CESAR of the 6th Frame Program of the European Commission. The software ALAN was developed in the frame of this project. The goal of the project SALI is enhancement of versatility of this software, improvement of calculations, optimization of computational procedures and databases, validation based on flight tests and first of all preparation for its commercialization. The important result of the project will be the user's guide and the detailed analysis of implemented methodology of calculation. The new software should replace the very successful software SAVLE which was created in 1980s. The architecture of this software does not allow its adaptation to the new possibilities of computer technology - the accuracy of the dynamic aircraft model does not correspond to the current knowledge and work with the program is time-consuming. The consortium of the project partners intends to utilize their experience with the software SAVLE and ALAN and to create the new software which has the ambition to become a common software tool for aircraft certification according to the regulation CS-23 and which is accepted by aviation authorities. The aim is to create flexible, adaptable and extensible software which will help to accelerate development work, will be able to archive input data and calculation results transparently and will improve critical aircraft loading calculation. It will consequently reduce costs of development and modification of aircraft, will enhance air traffic safety and will optimize airframe weight.