Figure 2. Image of crack areas on the bearing trunnion As can be seen in Figure 2, the fracture in sliding bearing shell has reached the level to prevent the efficient operation of the bearing. In addition, the fracture seen in figure 2 continues to progress. Differences in the values of the vibration sensor connected to the turbine generator unit were interpreted and the generator guide bearing area was disassembled and fixed on the fracture bearing shell and the fault clearance studies were initiated without causing major damage to the bearing. Figure 3 shows the repair stages of the crack area.