118641 – Cessna Textron Wescon Nylon Seat Roller
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Overview
The 118641 is a genuine Cessna Textron OEM nylon seat roller, an essential component for the pilot and co-pilot seat adjustment mechanism in a vast range of Cessna aircraft. Originally manufactured by Wescon, this precision-molded roller is designed to fit into the seat's structural frame and engage with the floor-mounted seat tracks, allowing the seat to slide smoothly fore and aft. Worn or cracked seat rollers can cause binding, difficult adjustment, and most critically, can prevent the seat's primary locking pin from properly engaging, creating a significant safety hazard. This genuine OEM roller ensures a perfect fit and the correct material properties for a safe and reliable repair.
Key Features
- High-Durability Nylon: Molded from a high-grade, wear-resistant nylon polymer. This material is specifically chosen for its low-friction properties, high compressive strength, and resistance to degradation from dirt, moisture, and cleaning chemicals.
- Smooth & Quiet Operation: The precisely dimensioned, smooth surface of the roller allows the seat to be adjusted with minimal effort, eliminating the binding, grinding, and excessive noise associated with worn or damaged rollers.
- Critical Safety Component: Ensures the seat is properly supported and aligned within the seat track, which is necessary for the primary seat locking pin to securely engage in the track holes. This prevents dangerous, uncommanded seat slippage during takeoff or landing.
- Genuine OEM Part: As a genuine Textron Aviation part, it guarantees the exact dimensions, material hardness, and durability specified by the original aircraft designers, ensuring a fully airworthy and compliant repair.
- Direct Fit Replacement: Engineered as a direct replacement for the original part, ensuring a straightforward installation process during routine maintenance or seat overhaul.
Technical Specifications
- Part Number: 118641
- Component Type: Seat Adjustment Roller
- Material: High-Strength Nylon Polymer
- Nominal Dimensions:
- Outside Diameter: 0.86 inches
- Inside Diameter (Hole): 0.26 inches
- Width: 0.44 inches
- Application: Pilot / Co-pilot seat track system
- Certification: FAA Production Approval
Aircraft Compatibility
The 118641 seat roller is one of the most widely used parts in the Cessna single-engine fleet, found in most models produced over several decades. It is crucial to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.
- Compatible Aircraft Models:
- Cessna 150 / 152
- Cessna 172 Skyhawk
- Cessna 177 Cardinal
- Cessna 180 / 182 Skylane
- Cessna 185 Skywagon
- Cessna 206 Stationair
- Cessna 210 Centurion
Applications
The 118641 is the specified component for addressing common seat maintenance issues:
- Seat System Overhaul: A mandatory replacement item when overhauling the seat assemblies to restore smooth and safe operation.
- Repair of Jammed/Binding Seats: Often the primary cause of seats that are difficult or impossible to adjust.
- Airworthiness Directive (AD) Compliance: The inspection and replacement of seat rollers and locking components are subject to specific FAA Airworthiness Directives (e.g., AD 2011-10-09), making this a flight-critical part.
Why Choose 118641?
A functional seat adjustment system is not just a matter of comfort; it is a critical flight safety system. The infamous "Cessna seat slip" is a well-documented hazard that can have catastrophic consequences during critical phases of flight. This issue is often caused by worn rollers and locking components preventing proper pin engagement. Using a genuine Cessna 118641 OEM roller ensures that the replacement part has the correct dimensions and material strength to restore the system to its original, certified condition. For a repair this critical to safety, there is no substitute for genuine, traceable OEM parts.
Order Your 118641 Seat Rollers Now
Ensure the safety and proper function of your aircraft's seating system. Visit Airparts.aero to order your genuine Cessna Textron 118641 seat rollers today.
The 118641 seat roller is a key element in the proper function of the entire seat locking mechanism. Its primary role is to lift the seat frame slightly, reducing friction and allowing the assembly to slide. More critically, its dimensional integrity ensures that the seat locking pin is correctly aligned with the holes in the seat rail. If the rollers are worn, flattened, or cracked, the seat can sag, causing the locking pin to only partially engage or to rest on the "land" between the holes. This creates a false-locked condition where the seat feels secure but can slip backward under the force of acceleration during takeoff, incapacitating the pilot. Regular inspection and replacement of these rollers as part of the seat system's safety check is a fundamental aspect of responsible Cessna ownership and maintenance.
