98V53309002000 is a precision aviation maintenance tool compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine turbine and compressor section maintenance.It functions as a high-precision blade root gauge, specialized in dimensional inspection of turbine and compressor blade roots during MRO checks. It accurately measures root profile, thickness, and fit dimensions against strict aviation tolerances, detects wear, corrosion or deformation, ensures tight and consistent fit with rotor disk slots, prevents blade looseness, vibration and fatigue damage under high-speed rotation, and avoids potential blade detachment risks in flight.Made of high-strength wear-resistant stainless steel, it resists high temperature and mechanical wear, working stably at -55℃ to 320℃. Weighing 0.42kg, it features calibrated measuring surfaces, clear graduation and ergonomic design for easy operation, delivering reliable and repeatable results. It is a critical tool to guarantee blade-root fit integrity and overall engine operational safety and reliability.