This study focuses on optimizing the process of defining responsibility zones within the context of leasing for small aviation using an Enterprise Asset Management (EAM) system. The management of responsibility zones is crucial in the leasing process of small aviation, and the application of EAM systems enhances efficiency. The paper examines the complexities involved in determining responsibility zones and proposes an innovative conceptual model that leverages EAM technology. The model facilitates the accurate allocation of responsibilities, streamlines leasing operations, and contributes to the overall efficiency of the small aviation leasing industry. The practical significance of this research lies in its potential to enhance the precision and effectiveness of responsibility zone determination, ultimately benefiting the management of small aviation leasing operations.