在國際民航組織ICAO(2017)安全報告中，可控飛行撞地(Controlled-Flight-Into-Terrain, CFIT)被歸入高風險失事類別，且在2016亞太平洋區域年度航空安全報告書中亦統計其為近十年來，亞太平洋區域最常發生的航空意外事故類別。
本研究旨在探討航空器可控飛行撞地之風險因素，透過文獻回顧整理相關風險因素，以SHELLO模式為基礎將各風險因素做分類，再利用飛行員及專家兩階段問卷評估，針對可控飛行撞地之風險因素為研究項目，並著重相關人為因素資料分析，採用層級分析法排序風險因素之重要度，加上改善可行性評估，以找出應優先著重之風險因素。本研究以第一線飛行員為首要問卷對象，藉由飛行員評估並篩選出較重要之風險因素，在進一步經由專家問卷的方式探討其各層級風險因素之相互關係及權重，找出較重要之關鍵因素，綜合專家評估其改善可行性，排定風險因素之改善優先順序，進而降低航空器可控飛行撞地發生之風險。
研究結果顯示，「組員資源管理」、「安全態度及紀律」、「在進場中，駕駛員對於最低高度個別監視」、「對標準操作程序之遵守」、「對於進場程序之熟悉程度」、「於進場各階段對於高度檢查之程序」及「高度表設定」，上述風險因素為優先改善項目，期相關單位參考優先擬定改善策略。

The International Civil Aviation Organization (ICAO, 2017) identified the controlled-flight-into-terrain (CFIT) in the high-risk accident occurrence categories. Furthermore, the ICAO shows that CFIT accidents are the ones that have happened most frequently in Asia Pacific in recent years.
The purpose of this research is to explore the risk factors and the prevention strategies of CFIT. The important risk factors and the importance-achievability analysis are brought up through the questionnaire survey from the perspective of pilots and experts. The research used SHELLO model to construct the pilots human factors framework and select related risk factors, then used Analytic Hierarchy Process to analysis the relative importance of risk factors and combined with its improvement-achievability scores to serve as a suggestion for CFIT prevention.
The research shows that the “CRM”, ” Safety attitude and discipline”, “independent verification by pilot monitoring of minimum altitude during DME approach”, “standard operation procedure”, “familiarity with descent/approach procedures”, “procedures of checking crossing altitude at IAF position”, “Incorrect automation setting” and “Radio-altitude setting” are the most significant risk factors of CFIT accidents. This study also prioritizes improvement strategies in order to help management authorities improve major operational and managerial weaknesses so as to reduce the CFIT accidents.

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