Abstract: In order to study correlation between pilot operation and environmental factors and lateral position error during aircraft approach,QAR parameters that affect lateral position error based on aircraft lateral position correction process and QAR data were identified. Fuzzy correlation model was established, in which fuzzy C-means (FCM) clustering method was used to cluster sample values of QAR parameters, and membership matrix of each parameter was obtained, combined with Apriori algorithm, association rules among parameters and between parameters and lateral position errors were mined. Correlation was quantified based on association rules, and real sample data of A320-200 was used for correlation analysis. The results show that identified QAR parameters are all related to lateral position error under specified 30% support degree. Elevation angle, slope, rudder position and wind direction have great influence on lateral position error.

Key words: paired approach, lateral position error, quick access recorder(QAR) data, correlation analysis, fuzzy association model