Existing aviation safety systems are mostly based on the simple recording and/or registration of flight data. The recorded data are currently only analysed post-flight or post-crash. PASS and its implementation by the ONBASS project is devoted to the creation of unavoidable real time flight data registration and processing (during the flight) with the goal to dynamically reduce the probability of aircraft incidents and/or accidents. This will be achieved through the comparative analysis of current and previously recorded data and by the timely reaction to a predicted undesirable situation, which would be the result of such an analysis. The current project objective is to monitor the aircraft and the way it is being piloted and provide advice so that the pilot can anticipate and manage hazards and avoid harm, thus improving the reliability of flight. A future objective is to integrate ONBASS with the Flight Control System to improve safety automatically. Thus, the advantages of the ONBASS approach would be:

• Automatic on-board flight data processing of safety information.
• Automatic delivery of flight safety related data to the pilot and the on-ground subsystem both during and post-flight. In this fashion undesirable situations could be avoided and required maintenance activities could be prepared to be carried-out immediately after the flight. As a result, aircraft availability and the economic efficiency of operations would be increased.
• Automatic cancelling of further flights of an aircraft if the flight data analysis demonstrates an unacceptable risk.