S9413-114 - Textron Aviation OEM Preformed Packing O-Ring

S9413-114 – Textron Aviation OEM Preformed Packing O-Ring

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation S9413-114 is a genuine OEM, flight-critical preformed packing O-ring, engineered specifically for sealing the Fuel Control Unit (FCU) on a wide range of Cessna aircraft equipped with Continental engines. This is not a standard hardware O-ring; it is a precision-molded seal fabricated from a high-performance Fluorocarbon (FKM) elastomer. It is designed to provide a positive, leak-proof seal against high-pressure aviation fuel while withstanding the intense heat and vibration of the engine compartment. As a genuine Textron OEM part, it guarantees the precise dimensions and material properties required for this critical firewall-forward application.

Key Features

• High-Temperature Fluorocarbon (FKM) Material: Fabricated from a Viton® (FKM) or equivalent fluorocarbon elastomer. This material provides exceptional resistance to chemical degradation and maintains its sealing integrity at the high operating temperatures found on and around the engine.
• Superior Fuel Resistance: Specifically formulated for long-term, continuous exposure to 100LL Avgas and other aviation fuels. It is highly resistant to swelling, hardening, and permeation, ensuring a durable, long-lasting seal.
• High-Pressure Sealing: Designed to create a reliable seal at the interface of the fuel control unit, preventing leaks of high-pressure fuel, which would create a significant fire hazard.
• Precision Molded Dimensions: Manufactured to extremely tight tolerances for cross-sectional diameter and inside diameter. This precision ensures a perfect fit within the machined groove of the fuel system component, providing the correct amount of "squeeze" for a reliable seal.
• Genuine Textron OEM Part: As a genuine factory component, it guarantees the correct material compound, durometer (hardness), and shelf-life controls required for a safe, airworthy, and long-lasting installation in a critical fuel system.

Technical Specifications

• Part Number: S9413-114
• Component Type: Fuel Control Unit (FCU) O-Ring Seal
• Material: High-Temperature, Fuel-Resistant Fluorocarbon Elastomer (FKM / Viton®)
• Primary Function: Provides a static seal on fuel system components.
• Certification: FAA Production Approval

Aircraft Compatibility

The S9413-114 is a critical sealing component on a vast number of Cessna's most popular high-performance single-engine aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.

• Common Aircraft Models:
  • Cessna 182 Skylane (fuel-injected models)
  • Cessna 185 Skywagon
  • Cessna 206 Stationair / Turbo Stationair
  • Cessna 207 Skywagon
  • Cessna 210 Centurion / Turbo Centurion

Applications

The S9413-114 is an essential component for fuel system maintenance:

• Fuel Control Unit Installation: A mandatory replacement part any time a fuel control unit or fuel pump is removed, overhauled, or replaced.
• Engine Overhaul: A key seal that is always replaced during an engine overhaul or when the accessory case is serviced.
• Fuel Leak Repair: The primary component to replace when troubleshooting a fuel leak originating from the mating surface of a fuel system component.

Why Choose S9413-114?

A high-pressure fuel leak in the engine compartment is one of the most dangerous situations that can occur in an aircraft, posing a severe fire risk. The integrity of every seal in the fuel system is paramount. Using a genuine Textron Aviation S9413-114 OEM O-ring is the only way to ensure the seal is made from the correct FKM compound, capable of withstanding the combination of fuel, heat, and pressure. Substituting with a non-certified O-ring made from the wrong material (like standard Nitrile) will lead to rapid failure. For a flight-critical seal, there is no substitute for a genuine OEM part.

Order Your S9413-114 O-Rings Now

Ensure a leak-free, airworthy fuel system with a genuine Textron Aviation OEM seal. Visit Airparts.aero to order your S9413-114 O-rings today.

The S9413-114 O-ring typically functions as a face seal in the fuel control unit (FCU) or fuel pump mounting flange. In this application, it sits in a machined groove on one surface and is compressed against a flat surface on the mating component. The FKM material is essential because Avgas contains aromatic hydrocarbons that cause significant swelling in standard Nitrile (Buna-N) rubber. The high fluorine content in the FKM polymer makes it exceptionally resistant to this swelling and chemical attack. This ensures the O-ring maintains its specified durometer and physical properties, providing a consistent sealing force throughout its service life without softening or extruding under pressure.

Note: This is a single-use, flight-critical sealing component. It must be replaced whenever the component it seals is removed. Ensure all sealing surfaces are meticulously clean, dry, and free of nicks or scratches before installation. Lubricate the O-ring with clean engine oil or a compatible lubricant before assembly to prevent damage.