R221485 - Textron Aviation OEM Oil Coolant Hose

R221485 – Textron Aviation OEM Oil Cooler Hose Assembly for Cessna 210

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Overview

The R221485 is a flight-critical, genuine Textron Aviation Original Equipment Manufacturer (OEM) oil cooler hose assembly, specifically designed for use on Cessna 210 Centurion series aircraft. This is not bulk hose material; it is a complete, factory-fabricated assembly engineered to transport high-temperature engine oil from the engine to the oil cooler and back. The integrity of this component is absolutely essential for regulating engine oil temperature and, ultimately, for the safe operation of the engine.

This assembly is constructed from a high-performance, PTFE-lined, stainless steel-braided hose for maximum temperature and pressure resistance. The end fittings are permanently crimped or swaged at the factory to ensure a leak-proof connection, and the entire assembly is protected by an integral, high-temperature firesleeve. As the genuine OEM part, the R221485 guarantees the correct length, fitting orientation ("clocking"), and material specifications required for an airworthy installation.

Key Features

• Genuine Textron Aviation OEM Part: Guarantees the part is the factory-specified and fully certified component, ensuring a perfect fit and uncompromising safety for specified Cessna 210 models.

• Complete, Ready-to-Install Assembly: A finished hose assembly with permanently attached end fittings, eliminating the risks and variables associated with field fabrication.

• High-Performance PTFE-Lined Hose: The Polytetrafluoroethylene (PTFE) inner tube is chemically inert to engine oil and additives and is capable of withstanding high operational temperatures.

• Stainless Steel Braid Reinforcement: An outer braid of corrosion-resistant steel provides the strength to contain the high pressure of the engine's oil system and protects the core from abrasion.

• Integral AS1072 Firesleeve: Protected by a distinctive orange, silicone-coated fiberglass firesleeve, which provides thermal insulation and is designed to withstand a direct 2000°F flame for a specified period, preventing the hose from contributing to an engine fire.

• Flight-Critical Component: A "no-compromise" part, as a failure in service would lead to a rapid and catastrophic loss of engine oil.

Technical Specifications

• Part Number: R221485

• Component Type: Fabricated Oil Cooler Hose Assembly

• OEM Authority: Textron Aviation (Cessna)

• Hose Material: PTFE inner tube with stainless steel braid reinforcement.

• Fittings: Permanently crimped/swaged steel or aluminum fittings with specific end configurations and orientation per the engineering drawing.

• Outer Protection: Integrated silicone firesleeve conforming to AS1072 Type II standards.

• Governing Specification: Textron Aviation Engineering Drawing R221485.

Aircraft Compatibility

This OEM oil cooler hose assembly is the specified component for several models within the Cessna 210 Centurion family, particularly turbocharged variants.

• Primary Aircraft Platforms:

  • Cessna T210 Centurion (specific models and serial number ranges)

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 flexible conduit for circulating engine lubricating oil between the engine and the firewall- or baffle-mounted oil cooler.

Why Choose R221485?

Engine oil lines are among the most critical components in a piston aircraft. A failure of a hose or fitting leads to an immediate, catastrophic loss of engine oil, which will result in complete engine seizure within minutes. The genuine Textron OEM R221485 assembly is the only part guaranteed to be manufactured with the correct hose material, the correct fittings, and, most importantly, a factory-quality, pressure-tested crimp. Attempting to substitute this with a locally fabricated hose from a non-certified source, or continuing to fly with a hose that is past its service life, introduces an unacceptable risk of engine failure.

The integral AS1072 Type II firesleeve on the R221485 hose assembly is a critical passive fire protection system. Its engineering function goes beyond simple insulation. The outer layer is a specially formulated, self-extinguishing silicone rubber. When exposed to a direct flame at approximately 2000°F (1093°C), the silicone does not melt; instead, it undergoes a process of ablation, where it chars and transforms into a non-conductive, crusty silica (SiO2) ash. This endothermic transformation absorbs a significant amount of thermal energy, acting as a heat sink. Beneath this ablative layer is a braid of amorphous silica or fiberglass, which provides an exceptional thermal barrier with a very low coefficient of thermal conductivity. This two-layer system is designed to maintain the integrity of the internal hose and its flammable contents for a minimum of 15 minutes, providing the pilot with critical time to manage the emergency and secure the engine before the oil line can rupture and feed the fire.

Note: This is a flight-critical, life-limited component that must be replaced at specified calendar or hourly intervals, whichever comes first, as defined by the aircraft maintenance manual or relevant service bulletins. The hose's manufacturing date must be checked before installation. Installation must be performed by a certified A&P mechanic. The hose must be routed correctly to avoid any chafing, kinking, or contact with hot exhaust components, and the end fittings must be torqued to the precise value specified in the maintenance manual.

Documentation

All technical data, installation procedures, and service life information for the R221485 hose assembly are proprietary to Textron Aviation. This information is contained within the official Maintenance Manual and Illustrated Parts Catalog for the applicable Cessna 210 model. No public-facing documentation is available.