Separative processes include machining and metal-removing processes, such as laser caving or adaptive high-speed milling. These are high-tech special processes for the repair of engine blades and vanes that are used to efficiently produce flared cooling air holes and to mechanically restore the blade tip contour, respectively. Electro discharge machining is used by MTU Maintenance to manufacture complex, highly precise geometries or shaped cooling air holes.
Component cleaning also counts among the separative processes. Cleaning is a very important part of component repair because only perfectly clean components ensure the high repair quality for which MTU Maintenance is renowned. For example, MTU's repair specialists have introduced autoclave cleaning for engine blades and vanes, a process capable of reliably and fully opening plugged cooling air holes. Another special cleaning process is fluoride ion cleaning which is used to optimally prepare cracks in turbine blades for brazing repair.