In order to study the flight risk of civil aviation in China, a risk assessment method of flight security hazard of China civil aviation based on QAR over-limit events is proposed. The potential security hazard of China civil aviation is classified by the risk contribution degrees of risk factors firstly, then a risk assessment index system of potential security risk is constructed on the basis of events which exceed the limits of flight operations quality assurance. Combined with the risk control standards of China civil aviation industry (risk threshold), risk assessment models are established for discrete and continuous over-limit events respectively. By using the actual operational QAR data of Civil Aviation Administration of China (CAAC) in 2017 and the proposed method, a risk assessment of direct security hazard of China civil aviation is carried out, and the results are in agreement with the safety risk analysis conclusion of the Civil Aviation Safety Report of China, thus verifying the rationality of the proposed index system and models.

civil flight security  /  risk assessment  /  quick access record over-limit events  /  risk contribution degree