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C622A1002105 – Airbus Helicopters OEM Main Rotor Hub Equipped
Available now on the Airparts.aero Marketplace.
Overview
The Airbus Helicopters C622A1002105 is a flight-critical, OEM-equipped main rotor hub for the EC120B "Colibri" light helicopter. As the central component of the main rotor assembly, this hub is the primary structural element that secures the three main rotor blades to the main mast. It is engineered to transmit the immense rotational forces from the main gearbox, translate cyclic and collective control inputs into precise blade pitch changes, and absorb the complex, multi-axial loads experienced during all phases of flight. The C622A1002105 is integral to the advanced Spheriflex rotor head design, a bearingless system that provides exceptional maneuverability, reduced maintenance, and a lower noise signature, which are hallmarks of the EC120B platform.
The structural integrity and flawless performance of the main rotor hub are paramount to the safety and airworthiness of the helicopter. This component bears the full weight of the aircraft in flight and must withstand continuous, high-amplitude fatigue loading. For this reason, it is subject to stringent airworthiness directives and has a defined service life. The use of a fully certified, OEM C622A1002105 hub is non-negotiable for ensuring the safety, reliability, and operational performance of the aircraft.
Key Features
OEM Certification: Manufactured by Airbus Helicopters (formerly Eurocopter) to the highest aviation standards.
Spheriflex Design Integration: Specifically engineered for the Spheriflex semi-rigid, bearingless main rotor head, enabling smooth control response and reduced vibration.
Flight-Critical Component: A primary load-bearing structure essential for controlled flight.
High-Fatigue Resistance: Designed and manufactured to withstand extreme, repetitive aerodynamic and centrifugal forces.
Precision Machining: Machined to exceptionally tight tolerances to ensure perfect balance, alignment, and interface with the main mast and rotor blades.
Corrosion-Resistant Finish: Treated with specialized coatings to protect against environmental factors and prevent corrosion.
Technical Specifications
Part Number: C622A1002105
Component Type: Main Rotor Hub Equipped Assembly
OEM Manufacturer: Airbus Helicopters / Eurocopter France
Material: Typically a high-strength, fatigue-resistant metallic forging, such as aerospace-grade titanium or aluminum alloy. Specific alloy must be confirmed by OEM Certificate of Conformance (CofC) or maintenance documentation.
Finish: Corrosion-inhibiting primer and topcoat.
Governing Specifications: Certified under European Union Aviation Safety Agency (EASA) and Federal Aviation Administration (FAA) type certificates. Subject to specific Airworthiness Directives (ADs), including AD 2010-0026-E.
JASC Code: 6220 - Main Rotor Head
Certification: EASA/FAA Certified Component
Aircraft Compatibility
Airbus Helicopters (Eurocopter): EC120B Colibri
Note: This list is for reference only. The aircraft's specific Illustrated Parts Catalog (IPC) and maintenance manual are the final authorities for determining part applicability and interchangeability.
Applications
The C622A1002105 serves as the central structural interface of the main rotor system. Its primary applications include:
Secure attachment of the main rotor blades.
Transmission of drive torque from the main mast to the rotor blades.
Accommodation of blade flapping, lead-lag, and feathering (pitch change) motions via the Spheriflex system.
Transfer of pilot control inputs from the swashplate to the rotor blades to control aircraft attitude and lift.
Why Choose C622A1002105?
Choosing the OEM-certified C622A1002105 main rotor hub is an investment in safety and reliability. As a life-limited, flight-critical component, there is no substitute for the quality, material integrity, and manufacturing precision of the original equipment manufacturer. The use of non-certified or "gray market" parts introduces unacceptable risks of catastrophic material failure, which could lead to the loss of the aircraft and its occupants. This genuine Airbus Helicopters component ensures full compliance with all airworthiness standards and guarantees the engineering performance intended for the EC120B's sophisticated rotor system.
The C622A1002105 hub is the core of the Spheriflex rotor system, an advanced semi-rigid, bearingless design that leverages the principles of anisotropic composite mechanics and elastomeric deformation. Unlike traditional fully articulated systems that rely on numerous mechanical hinges and bearings (e.g., flapping hinge, lead-lag hinge), the Spheriflex system accommodates these complex motions through the controlled flexing of its components. The hub itself is a rigid, monolithic structure, but it interfaces with composite yokes or arms and spherical elastomeric bearings. These specialized bearings, made of laminated layers of elastomer and metal shims, allow for the critical feathering motion (blade pitch change) through torsional deformation while being stiff in the radial and axial directions. Flapping and lead-lag movements are accommodated by the engineered flexibility of the composite blade grips and the central star-shaped element. This design philosophy significantly reduces part count, eliminates the need for lubrication, and provides a "fail-safe" characteristic, where damage propagation is slow and visually identifiable, thereby enhancing safety and simplifying maintenance.
Note: The C622A1002105 is a life-limited and flight-critical component. Its installation, inspection, and tracking must be performed by a certified A&P mechanic strictly in accordance with the current Airbus Helicopters EC120B maintenance manual, applicable service bulletins, and airworthiness directives. Un-airworthy or counterfeit parts pose a direct and catastrophic risk to flight safety.
