The More Electric Aircraft is one of the main drivers in current aircraft systems' research and development. Indeed, higher electrification of aircrafts can reduce complexity as well as the weight of power supply systems. In this respect, one of the principal aims of MEA is to replace the hydraulic supply with electric technologies in the primary flight control surfaces. In order to do that, it is possible to employ an Electro-Mechanical Actuator (EMA) which mainly consists of a Brushless DC motor, a reducer and a ball screw. However, although this replacing seems feasible in theory, there are several issues that have to be overcome.