856A1603G04 is a precision-engineered aerospace engine high-pressure compressor (HPC) variable stator vane, compliant with AS9100D quality standards and FAA/EASA regulations, designed for CFM56-3 and CFM56-7B turbofan engines. It regulates the angle of incoming air into the HPC stages based on the engine's real-time operating status, optimizing air flow to avoid compressor surge, maintain consistent compression efficiency, and ensure stable air supply to the combustion chamber during all flight conditions.

Made from high-strength, heat-resistant titanium alloy, it withstands operating temperatures up to 605°C and continuous high-velocity air flow impact. Weighing 0.23kg with a precision-machined actuation interface, it enables fast angle adjustment and position verification during HPC MRO overhauls. FAA Part 25 certified, it is a key component for HPC performance and engine operational safety.