98V55109005000 is a precision aviation maintenance tool compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine turbine and compressor maintenance.It functions as a high-precision blade profile gauge, specialized in contour inspection of turbine and compressor blades during MRO checks. It accurately verifies blade airfoil profile, camber, thickness and leading/trailing edge dimensions against strict aviation tolerances, detects wear, erosion, deformation or thermal damage timely, ensures optimal aerodynamic performance, prevents airflow disturbance and efficiency loss in engine core sections, and avoids vibration-induced fatigue failure under high-speed rotation.Made of high-strength wear-resistant stainless steel, it resists high temperature and mechanical abrasion, working stably at -55℃ to 350℃. Weighing 0.38kg, it features calibrated precision contours, clear measurement references and ergonomic handles for easy operation, delivering consistent, reliable results. It is a critical tool to guarantee blade aerodynamic integrity and overall engine operational safety, efficiency and service life.