956A1056G02 is a precision aerospace fixture compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine accessory drive system maintenance. It serves as an accessory drive gear assembly and alignment fixture for MRO disassembly, repair and reassembly. It ensures precise gear meshing clearance, axial alignment and concentricity, maintains stable power transmission efficiency, eliminates abnormal wear, noise or tooth breakage caused by installation deviation, prevents drive system jamming under variable loads, and safeguards reliable operation of engine-mounted accessories. Made of high-strength alloy steel with anti-wear treatment, it resists mechanical impact and corrosion, working stably at -55℃ to 320℃. Weighing 2.1kg, it has calibrated benchmarks, secure locks and adjustable clamps for standardized, accurate operation. It is a vital tool to ensure accessory drive integrity and overall engine system reliability.