Analysis on paremeters characteristics of flight exceedance events based on distinction test

A method was put forward,which was based on distinction test and used to analyze the QAR exceedance events and flight data from QAR,to transform abundant data into useful,guiding and improving knowledge.Firstly,the applicability of the KW Test for analysis of exceedance events detected from QAR data was studied.And then some typical parameters were selected for the analysis,then the selected data from all flights were collected and processed with KW Test to find out significant distinctions of parameters between flights exceeding and not-exceeding.Thirdly the performances of parameters with significant distinctions were analyzed and explained with theory and experience,so that the influence of parameters on events could be explored.The events of Climb Speed High(35-1000ft),Descent Rate High(2000-1000ft),and Long Landing were given as examples of analysis.It can be seen from the research that KW Test can be used to measure the distribution distinction of flight parameters.The method in this paper can provide clues for experiential explanations of performance and mechanism of events and give guidance to aviation safety management work.