Check and repair the blades of the hot section of turbofan engines

Although at first glance, replacing the fixed and moving blade is the most logical method for the basic repairs of turbofan engines. But due to the high price of blades, an important part of the repair cost of turbine engines is related to the replacement of blades. On the other hand, according to the progress made in the field of repairing various types of blades and economic issues, repairing damaged blades is considered as a priority during the basic repair of turbine engines. Extensions of movable blade are considered more in the field of coating, welding, structural improvement. A high pressure moving vane is compared to three low pressure moving vanes due to the operating conditions.