The purpose of the present paper is to analyse a two non-identical units system model in which unit A is in operative mode and unit B is in standby mode. Two repairmen expert and ordinary are considered to repair the failed units. Unit A is repaired by expert repairman who is not always available with the system while unit B by ordinary repairman which is always with the system. Expert repairman takes some significant time to repair the failed unit and after the repair, inspection is carried out to ascertain whether the repair is perfect or not. If repair is perfect then the repaired units becomes operative otherwise the repair is referred to the expert repairman. The failures of the unit are independent and the failure time distribution of both the units are taken as general. All random variables are statistically independent. Using regenerative point technique we find the following characteristics of the system such as Transition Probabilities and Mean Sojourn times, Mean time to system failure (MTSF), Availability of the system, Busy Period for Expert and ordinary repairman, Expected number of Repairs of the unit, Expected number of Replacement of the unit, Expected number of Inspection of the unit, Net Expected Profit earned by the system during the interval (0,t) and in steady state.