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One hundred and fifty nine applicants who passed entrance examinations and were admitted to the flight school were kept under careful psychological observation and follow-up. It was found that those applicants who grew and developed in unfavorable conditions, i. e. under the influence of risk factors which include young age to start smoking, nervous shocks in childhood and adolescence, unstable family relations, alcoholic parents, etc., failed and were expelled from the school due to different reasons in a greater number of cases (p less than 0.01). Thus professional selection should include accentuated attention to risk factors that accompanied the years of personality formation which may help predict their inadequacies in psychic adaptation to the flying profession.