 This study investigated how pilot experience level could influence the classification of causal factors in an aviation accident using the human factors analysis and classification system, FACTS. Results showed that experienced pilots were more likely to attribute failures to higher level precursors than less experienced pilots. Additionally, experienced pilots were more likely to find fewer paths of association between different categories. This suggests that safety interventions may need to be tailored according to the experience level of the pilots involved. This article was authored by Wesley Tsikin-Chan and Wen Qinli.