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Recently several major transportation accidents have brought significant attention to the role of organizational factors in supporting safety within high-risk critical systems. However, little is essentially known about the types of organizational factors that contribute to these accidents, as there has yet to be a comprehensive analysis of these factors. This paper elaborates on the types of organizational factors that have contributed to pilot-error related aviation accidents in U.S. commercial aviation. Specifically, we analyzed 60 accidents with organizational cause factors from 1990-2000. Results from this analysis indicate that the type and frequency of organizational factors that contribute to accidents varies across type and size of aviation operations. However, the data also argue for a more thorough analysis of organizational factors during an investigation so that a clearer understanding of the actual contributing factors to an accident involving pilot error can be discerned.