856A4323G01 is a precision aerospace fixture compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine hydraulic actuator maintenance.It serves as a hydraulic actuator mounting and alignment fixture, specialized in accurate installation and positioning of engine hydraulic actuators during MRO disassembly, repair and reassembly. It ensures precise axial and radial positioning, consistent stroke alignment and secure fixation, eliminates installation deviation, prevents seal damage and motion jamming, ensures smooth and responsive actuation of engine control components, and avoids hydraulic system leakage or control failure under extreme flight conditions.Made of high-strength alloy steel with anti-corrosion coating, it resists mechanical impact and fluid erosion, working stably at -55℃ to 250℃. Weighing 1.7kg, it features a secure locking mechanism and calibrated locating references, enabling efficient standardized operations with reliable accuracy. It is a vital tool to guarantee actuator assembly integrity and overall engine control system safety and reliability.