856A1523P01 is a precision aerospace fixture compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine combustor liner maintenance. It serves as a combustor liner positioning and inspection fixture for MRO disassembly, repair and quality verification. It ensures precise fit clearance and concentricity of the liner, verifies no deformation or cracks after maintenance, maintains sealed combustion chamber structure, prevents high-temperature gas leakage and local overheating, and guarantees stable, efficient fuel combustion under all engine operating conditions. Made of high-strength heat-resistant alloy steel with anti-corrosion treatment, it resists extreme heat and mechanical impact, working stably at -55℃ to 500℃. Weighing 2.0kg, it has calibrated benchmarks, secure clamps and inspection reference marks, enabling efficient standardized operation and accurate quality checks. It is a vital tool to ensure combustor integrity and overall engine power output and safety.