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0500118-126 – Textron Aviation OEM Left Side Brake Line Assembly
Available now on the Airparts.aero Marketplace.
Legacy product, this has been replaced by Textron part number: 0500118-523
Overview
The Textron Aviation 0500118-126 is an OEM, flight-critical flexible brake line assembly engineered for the left-hand main landing gear of specific Cessna high-performance single-engine aircraft. This essential component serves as the high-pressure hydraulic conduit connecting the rigid airframe plumbing to the brake caliper. Its design is a sophisticated balance of flexibility and strength, allowing it to articulate with the landing gear strut during compression, extension, and ground maneuvering while reliably transmitting the hydraulic pressure required for effective braking.
This assembly consists of a specialized, multi-layer flexible hose with an inner core resistant to aviation hydraulic fluids, which is then reinforced by an outer sheath of braided corrosion-resistant steel (CRES). This construction provides exceptional burst strength and protects against abrasion and environmental damage. The component is terminated with precisely manufactured, factory-installed fittings and pre-bent rigid tubing sections, ensuring a perfect, leak-free installation. The integrity and performance of the 0500118-126 brake line are directly linked to the pilot's ability to safely control the aircraft on the ground, making it a non-negotiable component for airworthiness.
Key Features
OEM Certification: A genuine Textron Aviation part, ensuring absolute conformity to the original design, material, and performance specifications.
High-Pressure Integrity: Engineered to withstand the dynamic pressure spikes and sustained forces inherent in aircraft hydraulic brake systems.
Hybrid Construction: Integrates a flexible hose to absorb the dynamic motion of the landing gear with rigid, pre-formed tube sections for precise routing and clearance.
CRES Reinforcement: Features a braided stainless steel outer layer that prevents hose expansion, provides superior chafe resistance, and ensures a positive brake feel.
Factory-Installed Fittings: Equipped with high-quality, pre-installed fittings designed for a secure, long-term seal against high-pressure hydraulic fluid.
Flight-Critical Component: Essential for safe taxiing, rejected takeoffs, and landing rollout.
Technical Specifications
Part Number: 0500118-126
Component Type: Left Hand Main Landing Gear Brake Line Assembly
OEM Manufacturer: Textron Aviation (Cessna)
Material (Hose): Polytetrafluoroethylene (PTFE) or similar synthetic rubber inner tube, braided CRES sheath.
Material (Tubing/Fittings): Corrosion-Resistant Steel (CRES), likely 304 or 321 alloy. Specific material composition must be confirmed by OEM Certificate of Conformance (CofC).
Operating Fluid: Fully compatible with MIL-H-5606 or MIL-PRF-83282 aviation hydraulic fluids.
Governing Specifications: Manufactured to proprietary Textron Aviation standards that meet or exceed FAA airworthiness requirements.
Aircraft Compatibility
Cessna (Textron Aviation): P210R Pressurized Centurion, T210R Turbo Centurion, Skylane
Note: This compatibility list is for reference and may not be exhaustive. The specific aircraft Illustrated Parts Catalog (IPC) is the sole authoritative document for determining part applicability. This part is distinct from similar brake lines for other 210 models.
Applications
Hydraulic Fluid Transmission: Conveys high-pressure hydraulic fluid from the airframe-mounted rigid brake lines to the mobile brake caliper on the left main gear.
Dynamic Stress Absorption: The flexible hose section is designed to endure the constant movement and vibration of the landing gear assembly during all ground operations.
Aircraft Braking System Integration: Functions as a key element of the independent left-side hydraulic brake circuit, allowing for differential braking.
Why Choose 0500118-126?
An aircraft's braking system tolerates no compromises. The OEM 0500118-126 assembly is rigorously designed and tested to endure thousands of pressure cycles, extreme environmental exposure, and the unique stresses of landing gear operation. Utilizing non-certified or locally fabricated substitutes introduces a profound risk of catastrophic failure, such as a burst hose or leaking fitting. Such a failure can lead to a complete loss of braking on one side, potentially causing a dangerous ground loop or runway excursion. Sourcing a genuine Textron Aviation part is the only way to ensure safety, regulatory compliance, and the performance specified by the aircraft's original design.
The engineering principle behind the 0500118-126 assembly's braided corrosion-resistant steel (CRES) sheath is fundamental to its function in a high-pressure hydraulic system. This braid acts as a "zero-expansion" reinforcement layer. When subjected to the high internal pressure generated by the master cylinder—a direct application of Pascal's Principle—an unreinforced elastomeric hose would expand radially. This volumetric expansion would dissipate energy, leading to a delayed and "spongy" brake response. The CRES braid, with its high tensile strength, constrains this radial expansion, ensuring that the hydraulic fluid's volume remains nearly constant. This allows for the instantaneous transmission of force from the pilot's pedal to the brake caliper's piston, providing a firm, immediate, and predictable braking action. The interwoven nature of the braid also endows the assembly with high hoop strength and excellent resistance to kinking and external abrasion, critical attributes for a component operating in the dynamic landing gear environment.
Note: The 0500118-126 is a flight-critical safety component. Installation must be performed by a certified A&P mechanic in strict accordance with the current Textron Aviation maintenance manual for the specific aircraft model. All fittings must be torqued to specified values, and the brake system must be meticulously bled of air and leak-checked before the aircraft is returned to service. Brake hoses are subject to degradation and have service life limits; they must be inspected regularly and replaced as mandated by the maintenance schedule.
