S-123 - Textron Aviation OEM Bowden Housing Bushing

S-123 – Textron Aviation OEM Bowden Housing Bushing

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation S-123 is a genuine OEM bushing, a precision-machined component designed to support and guide Bowden-style push-pull control cable housings on a wide range of Cessna aircraft. This is not a generic bushing; it is an engineered component that acts as a critical anchor and chafe-guard for control cables such as the throttle, mixture, and propeller controls. Typically fabricated from an oil-impregnated bronze or a low-friction polymer, the S-123 ensures that the control cable housing is securely held in place, allowing the inner control wire to move smoothly and freely.

Key Features

• Low-Friction Guide: Its primary function is to provide a smooth, low-friction surface for the Bowden cable housing to pass through or terminate against. This is essential for ensuring that pilot inputs are transmitted to the engine or system with minimal resistance or binding.
• Vibration Damping & Chafe Protection: Acts as a critical isolator between the metal control cable housing and the aluminum airframe structure. It prevents vibration-induced chafing and wear on both the cable and the mounting bracket or firewall.
• Precise Fit & Alignment: Machined to exact dimensional tolerances to ensure a snug fit, which is critical for preventing "slop" or play in the control system. This positive fit translates to a more precise and responsive feel at the controls.
• Durable Materials: Manufactured from a high-quality, wear-resistant material (such as oil-impregnated bronze or high-grade polymer) that is designed for a long service life in the demanding engine compartment and airframe environment.
• Genuine Textron OEM Part: As a genuine factory component, it guarantees conformance to the exact material specifications and dimensional tolerances required by the original aircraft Type Certificate.

Technical Specifications

• Part Number: S-123
• Component Type: Bowden Control Cable Housing Bushing / Grommet
• Material: Oil-Impregnated Bronze or High-Strength Polymer
• Primary Function: Anchors, supports, and protects a push-pull control cable housing.
• Certification: FAA Production Approval

Aircraft Compatibility

The S-123 is a universal bushing used in countless locations on a vast number of Cessna's most popular single and multi-engine aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) to verify its application.

• Common Aircraft Models:
  • Cessna 100 Series: 152, 172 Skyhawk, 177 Cardinal, 182 Skylane
  • Cessna 200 Series: 206 Stationair, 210 Centurion
  • Cessna 300/400 Series Twins
• Common Systems:
  • Throttle Control Linkage
  • Mixture Control Linkage
  • Propeller Control Linkage
  • Cowl Flap and Cabin Air Controls

Applications

The S-123 is an essential component for ensuring the proper function of primary and secondary controls:

• Control System Rigging & Maintenance: Replaced during control cable replacement or rigging to eliminate friction and play in the system.
• Preventing Control Binding: A worn or missing bushing is a common cause of stiff or binding engine controls.
• Airframe Repair & Restoration: An essential hardware item to replace when performing firewall-forward restoration or repairs to instrument panels and control consoles.

Why Choose S-123?

The smooth, reliable operation of engine controls is a critical safety-of-flight issue. A binding throttle or mixture control can have serious consequences. The S-123 bushing is the small but vital component that ensures these controls move freely. Using a genuine Textron Aviation OEM part is the only way to ensure the bushing is made from the specified low-friction, durable material and has the precise dimensions for a proper fit. For the safety and precise feel of your aircraft's controls, there is no substitute.

Order Your S-123 Bushings Now

Restore the smooth, positive feel of your aircraft's controls with genuine Textron Aviation OEM components. Visit Airparts.aero to order your S-123 Bowden housing bushings today.

A Bowden cable is a mechanical system for transmitting force via a flexible cable. It consists of an inner wire that transmits the tension/compression and a static outer housing or conduit. For the system to be efficient, the outer housing must be securely anchored at both ends. The S-123 bushing is a key part of this anchoring system. It provides a secure, reinforced mounting point where the housing passes through a firewall or bracket. Its low-friction material allows the inner wire to move with minimal energy loss, while its robust design prevents the entire housing from shifting, which would introduce lost motion and a "mushy" feel to the controls.

Note: This is a flight control system component. Installation must be performed by a certified A&P mechanic. The integrity and proper installation of every component in a control system linkage is critical for flight safety. Worn bushings should be replaced to maintain a positive control feel.