System for in-situ surface processing of an engine blade

A process of using a system for in-situ surface processing of an engine blade within an aircraft engine extending along a main fluid flow direction from a fluid inlet side to a fluid outlet side, the process comprising the steps of:

• providing the system so as to comprise an endoscopic processing instrument, the endoscopic processing instrument comprising:
• a tubular shaft that can be angled, wherein the processing instrument is configured to be inserted in a non-angled initial configuration essentially radially through at least one lateral access port into the aircraft engine;
• and a rotatably driven tool holder for a tool head for surface processing, the rotatably driven tool holder being at a distal end of the shaft, wherein in an angled working configuration the processing instrument is configured to place the tool head, inserted into the tool holder, against a flow edge of the engine blade;
• inserting the processing instrument in the non-angled initial configuration substantially radially through the at least one lateral access port into the aircraft engine, wherein the lateral access port is arranged downstream of the engine blade;
• and subsequent to the step of inserting, with the processing instrument in the angled working configuration, placing a tool head that is inserted into the tool holder, against a flow edge of the engine blade.