0500118-511 - Textron Aviation OEM Fuel Line Assembly

0500118-511 – Textron Aviation OEM Fuel Line Assembly for Cessna 172

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Overview

The 0500118-511 is a flight-critical, genuine Textron Aviation Original Equipment Manufacturer (OEM) fuel line assembly for specific models of the Cessna 172. This is not bulk tubing; it is a complete, pre-fabricated, and ready-to-install component designed to transport fuel safely and reliably between key points in the aircraft's fuel system. It is constructed from a specific aluminum alloy and is precision-formed with all the complex bends and factory-perfect flares required for a drop-in fit.

As a genuine Textron (Cessna) part, this fuel line assembly is manufactured to the exact specifications of the original engineering drawing. This guarantees the correct tube diameter, wall thickness, material alloy, and, most importantly, a stress-free installation. The integrity of the fuel system is paramount to safety, and this OEM assembly is the only part guaranteed to restore the system to its original, type-certified condition.

Key Features

• Genuine Textron Aviation (Cessna) OEM Part: Guarantees the part is the factory-specified and fully certified component, ensuring a perfect fit and uncompromising safety.

• Pre-Formed Rigid Aluminum Tubing: Precision-bent on factory jigs or CNC benders to the exact, complex shape required to route correctly through the airframe, eliminating installation-induced stress.

• Factory-Formed 37° AN Flares: The tube ends feature factory-quality, 37-degree AN flares, which provide a superior, reliable metal-to-metal seal against the mating fittings.

• Includes Pre-Installed Fittings: The assembly comes complete with the correct AN-standard B-nuts and sleeves, ready for immediate installation.

• Designed for Drop-In Fit: Engineered to match the original part perfectly, ensuring a quick, correct, and safe installation without the need for field fabrication.

• Flight-Critical Component: A "no-compromise" part, as a failure or leak in a fuel line presents a direct and catastrophic fire hazard.

Technical Specifications

• Part Number: 0500118-511

• Component Type: Pre-Formed Rigid Fuel Line Assembly

• OEM Authority: Textron Aviation (Cessna)

• Material: Aluminum Alloy Tubing (e.g., 5052-O or similar, per OEM specification).

• Fittings: Pre-installed AN-standard B-nuts and sleeves.

• End Type: 37° AN Flares.

• Governing Specification: Textron Aviation Engineering Drawing 0500118.

Aircraft Compatibility

This OEM fuel line assembly is the specified component for certain models and serial number ranges within the Cessna 172 family.

• Primary Aircraft Platforms:

  • Cessna 172R

  • Cessna 172S

Note: Verification of applicability is the absolute responsibility of the installer. The aircraft's current Illustrated Parts Catalog (IPC) for its specific serial number is the final and absolute authority for confirming part number eligibility.

Applications

• Sole Application: To serve as a rigid conduit for transporting aviation gasoline (Avgas) between specific components of the fuel system (e.g., fuel selector valve, gascolator, firewall) as specified in the Cessna 172 IPC.

Why Choose 0500118-511?

An aircraft fuel line is a zero-tolerance component where leaks are not permissible. The genuine Textron OEM 0500118-511 assembly is the only part guaranteed to be manufactured from the correct aluminum alloy with the correct wall thickness and temper. More importantly, its complex bends are pre-formed in a stress-free state, and its flares are created with factory-grade tooling to ensure a perfect seal. Attempting to replicate a complex, multi-bend fuel line in the field is extremely difficult and risks creating stress fractures or imperfect flares that can fail under vibration, leading to a dangerous in-flight fuel leak.

The manufacturing of a pre-formed rigid tube assembly like the 0500118-511 is a highly controlled process designed to preserve the material's integrity. The aluminum tubing is bent on a CNC tube bender with a multi-ball mandrel and wiper die. This tooling supports the tube from the inside and outside during the bend, ensuring the tube wall maintains a consistent thickness. It prevents the outer wall from thinning excessively and the inner wall from wrinkling or collapsing, both of which would create a stress concentration and a weak point susceptible to fatigue failure. Furthermore, the 37° AN flare is created using a process that not only forms the cone but also work-hardens the material slightly, increasing its strength. The flared surface is then inspected for concentricity and a smooth finish, free of cracks or tooling marks, to guarantee a perfect metal-to-metal seal against the fitting cone. This factory-level process control is nearly impossible to replicate with hand tools in the field.

Note: This is a flight-critical component. Installation must be performed by a certified A&P mechanic. The line must be carefully installed without bending, twisting, or forcing it into position, as this will induce residual stress. The AN B-nuts must be torqued to the precise value specified in the aircraft maintenance manual to ensure a proper seal without over-stressing the flare. A thorough fuel system leak check must be performed after installation and before flight.

Documentation

All technical data and installation procedures for the 0500118-511 fuel line assembly are proprietary to Textron Aviation. This information is contained within the official Maintenance Manual and Illustrated Parts Catalog for the applicable Cessna 172 model. No public-facing documentation is available.