856A1071G04 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 casing positioning fixture, specialized in accurate fixing and alignment of combustion chamber casings during MRO disassembly, repair and reassembly. It ensures strict concentricity with core engine components and precise clearance tolerances, eliminates installation deviation or misalignment, prevents uneven gas flow and local overheating inside the combustion chamber, and avoids structural interference and thermal damage under high-pressure, high-temperature operating conditions.Made of high-strength heat-resistant alloy steel, it resists high heat and mechanical impact, working stably at -55℃ to 370℃. Weighing 1.6kg, it features a secure locking mechanism and precision locating benchmarks, enabling efficient, standardized assembly with consistent accuracy. It is a vital tool to guarantee combustion chamber structural integrity and overall engine operational safety, efficiency and service life.