The authors explored the characteristics of current trends in the domestic legal support development for the aviation accidents investigation by conducting a comparative analysis of national and international legislation on the investigation of aviation accidents and incidents. The methodological basis of the study have been represented by general and special legal methods, including dialectical, comparative law and statistics, which studied the problems of implementation of international law in the national law of Ukraine, analyzed analytical indicators of the number of aviation events and incidents in recent years, and objective preconditions for reforming the domestic legal framework under the influence of international standards and recommended practices of the International Civil Aviation Organization have been identified. Based on the analysis of regulations, the legal status and scope of competence of the National Bureau for Investigation of Aviation Events have been determined, as well as the prospects for further research in this area and ways to improve the legal regulation of aviation accident investigation have been outlined. The materials of the article can be used by researchers, scientific-pedagogical staff, flight safety management and aviation safety specialists in terms of studying, implementing and improving the rules of investigation of aviation incidents and incidents.