Safety risks are always an integral part of aircraft design. In the C-130 Hercules aircraft, due to its high service age, it is essential to carry out life expectancy plans and discuss flight safety, especially in the field of guidance and control, In such a way that every four years or every 5000 flight hours, overhaul and life extension operations for this plane are done, and the control surfaces are evaluated by X-RAY device. In this paper, the main parameters that lead to the creation of flight safety risks and the reduction of the plane's safety level, especially in the topic of guidance and control, were evaluated, as well as the valuable aspects that lead to the safe flight of this plane was analyzed. The type of paper is applied research, and the descriptive-analytical research method is used. The time domain of the study is from 2000 until now. This paper investigates the effect of avionics and navigation upgrades on flight risks. The data collection tools are questionnaires and flight records of the Hercules plane. In the discussion of gathering information through interviews, the researcher, after asking the question and receiving its validity from the expert community, conducted interviews with pilots and navigators. The reliability of the questionnaire was also calculated through Cronbach's alpha formula, and descriptive-inferential statistics and SPSS software (chi-square test) were used for data analysis.