171856-22 - Textron Aviation OEM Coupling Hose

171856-22 – Textron Aviation OEM Coupling Hose

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation 171856-22 is a genuine OEM, flight-critical, high-pressure flexible hose assembly, engineered for use in the hydraulic systems of the Cessna Citation 560 series of business jets. This is not a generic hose; it is a precision-fabricated assembly designed to convey hydraulic fluid under immense pressure, typically within the landing gear or flight control actuation systems. Featuring a durable Teflon (PTFE) inner tube, reinforced with a stainless steel braid, and terminated with permanent, factory-swaged fittings, the 171856-22 is built to withstand extreme pressures, temperatures, and constant flexing, ensuring the highest level of safety and reliability.

Key Features

• High-Pressure Capability: Engineered to operate reliably in a 3000 PSI aircraft hydraulic system. The multi-layer construction provides an exceptional safety margin against bursting or leakage.
• Teflon (PTFE) Inner Tube: Features a seamless, smoothbore inner tube made from Polytetrafluoroethylene (PTFE). This material is chemically inert and impervious to all aviation hydraulic fluids (including Skydrol), and is non-aging, meaning it will not dry out or crack over time like a rubber hose.
• Corrosion-Resistant Steel Braid: A single or double braid of high-tensile, 300-series Corrosion Resistant Steel (CRES) wire is woven over the PTFE tube. This reinforcement provides the burst strength and protects the inner tube from abrasion and damage.
• Vibration & Flex Resistance: As a flexible hose, it is designed to be installed in areas where there is significant movement between components, such as the connection from a rigid hydraulic line on the airframe to a landing gear strut or a flight control actuator.
• Genuine Textron OEM Part: As a genuine factory component, it guarantees the correct length, fitting type and orientation, and pressure rating required for a specific, certified application on the Citation 560. This ensures a perfect, stress-free installation.

Technical Specifications

• Part Number: 171856-22
• Component Type: High-Pressure Flexible Hydraulic Hose Assembly
• Inner Tube: Polytetrafluoroethylene (PTFE)
• Reinforcement: High-Tensile Corrosion-Resistant Steel (CRES) Braid
• Operating Pressure: Designed for 3000 PSI hydraulic systems.
• End Fittings: Factory-swaged, system-specific fittings.
• Certification: FAA Production Approval

Aircraft Compatibility

The 171856-22 is a specific factory part for the hydraulic systems of the highly successful Cessna Citation 560 family of mid-size business jets. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.

• Primary Aircraft Models:
  • Cessna Citation V (560)
  • Cessna Citation Ultra
  • Cessna Citation Encore
  • Cessna Citation Excel / XLS

Applications

The 171856-22 is a flight-critical component with several vital roles in the hydraulic system:

• Landing Gear Actuation: Commonly used as the flexible connection to the landing gear actuators, allowing fluid to flow while the gear is in motion.
• Brake Systems: Serves as the flexible line connecting the rigid airframe plumbing to the brake calipers on the wheel.
• Flight Control Actuation: Used to connect hydraulic lines to flap, spoiler, and other flight control actuators.
• Mandatory Replacement Item: Hydraulic hoses are life-limited components and must be replaced after a specified number of years or flight hours, regardless of their apparent condition, to ensure safety.

Why Choose 171856-22?

A ruptured high-pressure hydraulic hose in flight can lead to a rapid loss of system fluid, resulting in a failure of the landing gear, flaps, or brakes. The Textron Aviation 171856-22 is the certified, factory-tested component designed to prevent this. Using a genuine OEM hose is the only way to ensure the part is fabricated using the correct materials and, most importantly, that the end fittings have been swaged with factory-calibrated equipment and pressure-tested to guarantee their integrity. For a flight-critical hydraulic system, there is no substitute.

Order Your 171856-22 Hose Assembly Now

Ensure the integrity and reliability of your aircraft's high-pressure hydraulic systems with a genuine Textron Aviation OEM component. Visit Airparts.aero to order your 171856-22 hose assembly today.

The 171856-22 hose assembly is a critical component designed to handle both high pressure and dynamic flexing. The smoothbore PTFE inner tube offers an extremely low coefficient of friction, minimizing pressure drop and ensuring efficient power transmission. The CRES braid is woven at a precise angle to provide maximum strength against hoop stress (the outward force from internal pressure) while allowing the hose to bend without kinking. The factory-swaged end fittings are the most critical element; they create a 360-degree compression seal onto the hose, forming a connection that is typically stronger than the hose itself and is designed to be leak-proof and permanent for the entire service life of the assembly.

Note: This is a flight-critical and life-limited component. Installation must be performed by a certified A&P mechanic in strict accordance with the current Textron Aviation maintenance manual. The hose must be routed to avoid chafing and must not be twisted or bent tighter than its specified minimum bend radius. The end fittings must be torqued to the correct value.