This thesis presents an analysis on the impact of Electromagnetic Interference (EMI) on an aircraft engine. Conducted in collaboration with AvioAero s.r.l. , a leading aerospace company based in Turin, the study aims to evaluate the effects of EMI on engine performance and reliability by post-processing in closed-loop simulations the EMI disturbances that could affect an aircraft engine during the various phases of the mission. The research methodology involves a series of controlled EMI tests, data collection, and subsequent analysis trough NPSS closed loop simulations to identify potential vulnerabilities and performance degradation of an control system of a tuboprop engine. The findings highlight critical insights into the interaction between EMI and engine avionic components, providing valuable information to improve engine design and comply with safety standards.