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The research on the incidence of psychological aspects of human factors in aircraft accidents, was developed by the Aeronautical Institute of Psychology, aimed the identification of critical areas and the proposition of controlling actions. The proposed actions approach ways to favour the development of attitudes and behaviours, aiming the consolidation of a safety culture in the organizations. This work fills a great gap by making it possible to base the preventive activities on data that reflect the Brazilian reality. The ergonomic approach, wich considers the accident as a breakdown on the balance between individual, psychosocial and organizational conditionings of the man-taskmachine relationship, was used as support to group and analyse the data and identify critical areas. The date raised in this research detaches the attitude and the decision making process as the most critical areas of the psychological aspects in the occurence of the accidents. It can be observed that these areas are linked and directly influence the flying activity in terms of the planning of the flight and capacity of judgment of the pilot, compromising, in this way, the safe operation of the aircraft.