AE3663161H0184 - Textron Aviation OEM Hose Assembly

AE3663161H0184 – Textron Aviation OEM Oil Cooler Hose Assembly

Available now through the AirParts Aero marketplace.

Overview Section

The AE3663161H0184 is a high-specification Aviation Hose Assembly manufactured by Eaton Aeroquip for Textron Aviation (Cessna). This hose is primarily utilized in the engine compartments of high-performance piston aircraft, functioning as a critical conduit for the engine's oil cooling system.

Constructed using a medium-pressure, wire-reinforced synthetic rubber (often PTFE-lined in modern iterations), this assembly is designed to withstand the intense heat, vibration, and pressure spikes inherent in aircraft engine operations. The -0184 dash number indicates a precision length of approximately 18.5 inches (18 and 4/8"), factory-terminated with high-integrity fittings to ensure a leak-proof connection between the engine accessory gearbox and the oil cooler.

Key Features Section

• Medium-Pressure Reinforcement: Features a synthetic rubber inner tube reinforced with a stainless steel wire braid, providing excellent flexibility and high burst-pressure safety margins.

• Corrosion-Resistant Fittings: Equipped with aerospace-standard flared or flareless fittings, typically cadmium-plated or stainless steel, to prevent galvanic corrosion at the connection points.

• Wide Operating Temperature: Engineered to handle fluid temperatures ranging from -65°F to +300°F, ensuring the oil remains within operating limits during extreme high-altitude cold and high-power climbs.

• Oil & Fuel Compatibility: The inner liner is chemically stable when exposed to MIL-L-22851 mineral oils and MIL-L-23699 synthetic oils, preventing liner degradation or "sloughing."

• Lightweight Profile: Weighing only 0.87 lbs, this assembly minimizes unnecessary weight in the engine compartment while maintaining industrial-grade durability.

• Textron OEM Certified: Built to original Cessna engineering specifications, ensuring perfect routing and clearance from other engine components to prevent chafing.

Technical Specifications Section

Aircraft Compatibility Section

The AE3663161H0184 is a primary oil system component for the Cessna single-engine fleet:

• Cessna 172 Skyhawk (Series R, S, and P): Specifically used as an oil cooler supply or return line.

• Cessna 182 Skylane: Vital for managing oil temperatures in high-performance O-540 and IO-540 engine installations.

• Cessna 206 Stationair: Utilized in the heavy-duty cooling configurations required for utility and floatplane operations.

• Lycoming IO-360 / IO-540 Engines: Frequently specified in the installation kits for these powerplants when mounted in Cessna airframes.

Technical Applications & Safety

Engine hoses are "Life-Limited" components because rubber naturally loses its elasticity over time when exposed to heat (thermoplastic degradation).

Safety Warning: Inspect for "Hardness" and "Chafing." During every 100-hour inspection, the AE3663161H0184 should be checked for flexibility. If the hose feels "crunchy" or stiff when flexed, the inner liner has likely heat-hardened and is prone to cracking. Additionally, verify that the fire sleeve (if installed) is secure and that no engine components are rubbing against the hose wall. A burst oil cooler hose will result in a total loss of engine oil in less than 60 seconds, leading to catastrophic engine failure.

Technical Engineering Insight

The engineering value of the AE3663161H0184 lies in its Volumetric Expansion Coefficient. Under high oil pressure (typically 60–90 PSI in Lycoming engines), standard industrial hoses can "balloon," causing a temporary drop in oil pressure or erratic gauge readings. The AE366 series is designed with a high-modulus wire braid that limits this expansion, ensuring that the oil cooler receives a consistent flow even during cold-start pressure spikes. Furthermore, the "H" size code indicates a specific elbow or fitting orientation that is factory-preset to ensure the hose "clocks" correctly between the engine and the cooler without inducing torsional stress on the fittings.

Installation & Maintenance Addendum

1. Torque Control: Always use two wrenches when tightening the hose—one to turn the B-nut and a "backup" wrench on the fitting body. This prevents the hose from twisting (torsion), which can shear the internal wire reinforcement.

2. Minimum Bend Radius: Ensure the hose is routed such that it does not exceed its minimum bend radius. Tight bends lead to "kinking" of the inner liner, restricting oil flow.

3. Pressure Test: After installation, ground-run the engine for at least 5 minutes and inspect the crimp areas of the AE3663161H0184 for any signs of "weeping" before the aircraft is returned to service.