C21003-139 is a precision aviation maintenance tool compliant with AS9100D standards and FAA/EASA regulations, dedicated to aircraft fuel and hydraulic system MRO operations. It acts as a high-reliability aviation tube bender, specialized in shaping thin-walled aviation copper and aluminum tubes for fuel pipelines and hydraulic hoses, ensuring smooth bends without cracking or flattening. Made of premium hardened alloy steel with anti-corrosion finish, it resists wear and oil erosion, maintaining precise bending angles for tight pipeline fits. Its adjustable bending die supports multiple tube diameters, while the ergonomic handle enables effortless operation. Weighing 0.9kg, it is compact for on-site use even in narrow spaces. It guarantees leak-free pipeline connections, safeguards fluid system integrity, and is an essential tool for efficient aircraft maintenance and ground support.