Motor FAT was completed and was passed. The outstanding issue is ventilation fan/ motor affecting the power plant avaliabity. After many times of discussions, updated proposal to solve the backup problem of ventilation fan is given below. Based on low failure rate of ventilation fan, plus spare ventilation and 24-hour technical support, star-delta normation change over to backup operation by PLC, ventilation fan back up operation is solved. In case of one ventilation fan of moter failure,permanent solution for the motors' ventilation fan is provided.