In the time of globalization and the continuous travelling of people between different parts of the world, air transportation is becoming one of the most important modes of transport. Nevertheless, it is crucial to continuously improve the level of safety and reduce the absolute number of accidents and their victims. The risk analysis with the usage of IT system TURAWA, which was developed to collect the aircraft’s accidents informations, has been discussed in the presented article. Calculation of risk is based on the data sample collected in the operation process. The implementation of the risk of potential failure event in TURAWA is presented and compared with the prediction of such situation by the decision trees. It has been concluded that models should be developed, which cause in the elimination of the human factor from the decision making chain.