Parseh Designers Transportation Research Institute Quarterly Journal of Transportation Engineering 2008-6598 16 1 2024 09 22 Effectiveness of Crew Resource Management and Unsafe Factors on Air Accidents Effectiveness of Crew Resource Management and Unsafe Factors on Air Accidents 4317 4336 198602 10.22119/jte.2024.427037.2692 FA Mohammad Khalilnejad Assistant Professor, Faculty of Aviation, Amin Police University, Tehran, Iran Jalal Mansoorinezhad lecturer of Aviation Department, Amin Police University, Tehran, Iran Alireza Sekhavat Benis lecturer of Aviation Department, Amin Police University, Tehran, Iran Journal Article 2023 11 26 Since the beginning of aviation, the weakness in the proper management of interpersonal relationships, conduction of crew and human error have been known as important factors in the occurrence of aviation accidents. The purpose of the present research is to estimate the effectiveness of CRM and Unsafe factors on aviation accidents. This research is applied in terms of purpose and mixed in terms of method. There were 24participants in the qualitative part, experts and specialists of Police aviation of Iran, and the researchers reached theoretical saturation in the 16th person. The method of data collection in the qualitative part was semi-structured interviews. The statistical population of the quantitative part included a number of managers and flight crew of Police aviation of Iran, and using Cochran's formula and stratified random sampling method, 250 people were selected to be members of the statistical sample. The method of data collection in the quantitative part was the use of a researcher-made questionnaire that was valid and reliable. MAXQDA software was used to analyze qualitative data and SPSS software was used for descriptive and inferential analysis of quantitative data. The findings showed that 3inclusive themes in the form of 22basic themes in the field of CRM and 4inclusive themes in the form of 10basic themes regarding unsafe factors can play a role in the occurrence of air accidents. The results showed that the identified components effective in the occurrence of air accidents are: Mistake, Concepts and Practical skills, Lapse, Violation, Elements and Slip. Since the beginning of aviation, the weakness in the proper management of interpersonal relationships, conduction of crew and human error have been known as important factors in the occurrence of aviation accidents. The purpose of the present research is to estimate the effectiveness of CRM and Unsafe factors on aviation accidents. This research is applied in terms of purpose and mixed in terms of method. There were 24participants in the qualitative part, experts and specialists of Police aviation of Iran, and the researchers reached theoretical saturation in the 16th person. The method of data collection in the qualitative part was semi-structured interviews. The statistical population of the quantitative part included a number of managers and flight crew of Police aviation of Iran, and using Cochran's formula and stratified random sampling method, 250 people were selected to be members of the statistical sample. The method of data collection in the quantitative part was the use of a researcher-made questionnaire that was valid and reliable. MAXQDA software was used to analyze qualitative data and SPSS software was used for descriptive and inferential analysis of quantitative data. The findings showed that 3inclusive themes in the form of 22basic themes in the field of CRM and 4inclusive themes in the form of 10basic themes regarding unsafe factors can play a role in the occurrence of air accidents. The results showed that the identified components effective in the occurrence of air accidents are: Mistake, Concepts and Practical skills, Lapse, Violation, Elements and Slip. https://jte.sinaweb.net/article_198602_b3c5fb6de16a2e7f019ffbdd5b6f23a0.pdf