GA64579-2 - Turning Tube for ATR-72

GA64579-2 – Turning Tube for ATR-72

Available now on the Airparts.aero Marketplace.

Overview

The GA64579-2 is a genuine OEM, flight-critical turning tube, a primary structural component of the main landing gear (MLG) assembly for the ATR 42 and ATR 72 series of regional airliners. This is not a simple piece of tubing; it is a precision-machined, ultra-high-strength steel component that acts as a key pivot and linkage point within the complex kinematics of the landing gear retraction and extension system. Manufactured by or for ATR (Aerei da Trasporto Regionale) to the most stringent aerospace standards, the GA64579-2 is designed to withstand the immense torsional and shear loads experienced during all ground and flight operations.

Key Features

• Primary Structural Component: Serves as a major load-bearing and articulating member of the main landing gear. Its structural integrity is fundamental to the proper and safe operation of the gear.
• Ultra-High-Strength Steel Alloy: Forged and machined from an ultra-high-strength VAR (Vacuum-Arc Remelt) steel alloy, such as 300M or equivalent. This material provides the exceptional strength and fatigue resistance required to handle the immense shock loads of landing.
• Precision Machining & Tolerances: All diameters, wall thicknesses, and connection points are machined to exceptionally tight tolerances. This precision is essential to ensure smooth, binding-free movement of the landing gear and a proper fit with mating components like actuators and linkages.
• Corrosion & Wear Protection: Coated with a high-performance, multi-layer plating system that provides robust protection against corrosion, wear, and galling, ensuring a long and reliable service life in the harsh wheel well environment.
• Non-Destructive Tested (NDT): As a flight-critical structural component, each turning tube is subjected to 100% Non-Destructive Testing, such as Magnetic Particle Inspection (MPI), to guarantee it is free from any microscopic cracks or material flaws.

Technical Specifications

• Part Number: GA64579-2
• Component Type: Main Landing Gear (MLG) Turning Tube / Structural Linkage
• Material: Ultra-High-Strength VAR Steel Alloy (e.g., 300M)
• Finish: High-Performance, Anti-Corrosion Plating
• Inspection: 100% NDT Inspected (e.g., MPI)
• Certification: EASA / FAA Production Approval with full material and process traceability.

Aircraft Compatibility

The GA64579-2 is a specific structural component for the ATR family of regional turboprop airliners. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.

• Primary Aircraft Models:
  • ATR 42 (all series)
  • ATR 72 (all series)

Applications

The GA64579-2 is a flight-critical component with a singular, vital application:

• Landing Gear Retraction/Extension Kinematics: Acts as a key rotating or pivoting link in the geometric sequence that allows the main landing gear to retract into the nacelle and extend for landing. It transfers force from the hydraulic actuator to the main gear structure.
• Mandatory Overhaul/Replacement Item: Landing gear components are subject to strict life limits and overhaul schedules. This part must be removed, inspected, and re-certified or replaced in accordance with the aircraft's maintenance program.

Why Choose GA64579-2?

The landing gear of a transport-category aircraft is one of its most complex and highly-stressed systems. A failure of a primary structural component like the GA64579-2 turning tube would be catastrophic, leading to a gear collapse. Using a genuine OEM part from the ATR supply chain is the only way to ensure the component has the certified material strength, correct heat treatment, and a verified NDT inspection history required for this application. For the safety of the aircraft, its passengers, and crew, there is absolutely no substitute for genuine, fully traceable OEM structural components.

Order Your GA64579-2 Turning Tube Now

Ensure the structural integrity and safety of your aircraft with genuine, NDT-certified OEM landing gear components. Visit Airparts.aero to inquire about new or serviceable GA64579-2 turning tubes today.

The GA64579-2 is a key part of a complex "four-bar linkage" or similar kinematic mechanism that makes up the ATR's main landing gear retraction system. As the hydraulic retraction actuator extends or retracts, it pushes or pulls on a specific point in this linkage. The GA64579-2 is designed to rotate around a fixed pivot point, translating the linear motion of the actuator into the complex rotational and swinging motion required to fold the long landing gear strut up into the confined space of the engine nacelle. Its structural design must handle not only the static weight of the aircraft but also the immense bending and torsional moments generated by the actuator as it moves the massive gear assembly against aerodynamic forces.

Note: This is a flight-critical, often serialized and life-limited structural component. Installation, rigging, and all maintenance actions must be performed by a certified A&P or AME mechanic holding the appropriate ratings and in strict accordance with the current ATR maintenance manual. All work must be properly documented in the aircraft's permanent records.