Preliminary fault tree analysis of UAS flight failure under weather hazards

This paper presents the preliminary fault tree analysis of the risks connected with meteorological hazards for UAS operation. The top event tree considers the general key risks for SUAS. Then the impact of meteorological hazards into influencing factors is considered in the number of basic trees. The analysis aimed to evaluate the most critical weather-related events that can impact the failure of a UAS flight. The study was done for the observation during one summer month and took into account the restricted number of meteorological elements. The presented approach can be used for understanding the weather-related risks for particular climatic zones and areas of flight to develop strategies for risk mitigation in the frame of safety risk management when sUAS operations.