J71039-1 is a precision-manufactured aerospace engine high-pressure turbine (HPT) blade tip seal component, compliant with AS9100D quality standards and FAA/EASA regulations, designed for large commercial turbofan engines.It is a core sealing part for the HPT blade tip, minimizing the clearance between the turbine blade tip and the HPC shroud, which is critical for reducing the leakage of high-temperature, high-pressure exhaust gas in the HPT flow path, improving the turbine's energy conversion efficiency, and lowering the engine's overall fuel consumption.

Made from heat-resistant, wear-resistant nickel-based superalloy with a thermal barrier coating, it withstands operating temperatures up to 1620°C and continuous scouring from high-speed exhaust gas. Weighing 0.22kg, it allows fast replacement and clearance measurement during HPT MRO overhauls. FAA Part 25 certified, it is a key component for HPT operational efficiency.