856A3764G01 is a precision aerospace fixture compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine combustion chamber maintenance.It serves as a combustion chamber liner positioning fixture, used to accurately fix and align liner components during MRO disassembly, inspection, repair and reassembly. It ensures strict dimensional accuracy and concentricity, avoiding liner misalignment that causes uneven combustion, local overheating, thermal deformation and gas leakage, which is critical to stable engine combustion efficiency and structural integrity at high temperatures.Made of high-strength heat-resistant alloy steel, it resists high temperature and oxidation, working stably at -55℃ to 350℃. Weighing 1.2kg, it features quick assembly and disassembly for efficient maintenance, a vital tool to guarantee combustion chamber reliability and engine operational safety.