The increasing complexity of modern aircraft systems has made traditional text-based systems engineering methods progressively more challenging to manage and maintain. This paper investigates Model-Based Systems Engineering (MBSE) as a solution to these limitations. First, it examines the shortcomings of conventional development approaches and elaborates on the core principles and advantages of MBSE, along with the necessary tools and methodologies for implementation. Then, using the development of an electromechanical integrated management system as a case study, the paper demonstrates how MBSE employs models to facilitate standardization, design, analysis, verification, and validation of complex systems. The findings provide a practical framework for aviation professionals and systems engineers seeking to enhance the design, development, and performance of advanced aircraft systems through MBSE.