ABSTRACT The electric motor is an electromechanical device that converts mechanical energy into electricity energy. This mechanical energy is used for, for example, rotate the pump impeller, fan or blower, drive the compressor, lifting materials, etc.. Electric motors are used in the home (mixer, electric drill, fan) and in the industry, so it takes maximum care to maintain the efficiency of the motor. One of the factors that can affect the efficiency of the electric motor is sparking at the motor. At this internship opportunity working writer Final Project case study of a dc motor with a power output of 260 KW, 700 V voltage, and current 399 A, which occurs sparking. Steps to Repair the DC motor is by a variety of processes. Sparking the repair process has a variety of ways such as incoming inspection, electrical inspection, and cause sparking and repair itself. Keywords : Electric Motors, causes and fixes sparking iv