Discover the Tail Strike Risk during Take-off of an Airline Based on QAR Big Data

In order to help airlines discover the hidden risks of tail strike during the take-off phase, this article uses the quick access record (QAR) big data of the flight operational quality assurance (FOQA) Station of CAAC, and uses the industry-wide QAR data to compare with the QAR data of individual airline to find out whether an airline has outstanding problems, and uses mathematics Statistical t test to verify whether there is a significant difference. This article analyzes the data from July to December 2019 as an example, and finds that the A321 model of a certain airline has the risk of tail strike, that is, the take-off pitch angle is too big. The t-test of mathematical statistics is used to verify that there is a significant difference between the airline's take-off pitch angle and the industry's take-off pitch angle. In addition, the related speed at rotation, the speed at liftoff, and the average pitch rate are also analyzed, and it is found that they also have significant differences. This method can be further extended to other flight quality analysis to find potential safety hazards.