S2359-1 - Textron Aviation Cessna OEM Fuel Tank Vent Valve

S2359-1 – Textron Aviation Cessna OEM Fuel Tank Vent Valve

Available now on the Airparts.aero Marketplace.

Overview

The S2359-1 is a genuine Textron Aviation OEM fuel tank vent check valve, a flight-critical component designed for the fuel systems of numerous Cessna single-engine aircraft. This valve is engineered to perform a crucial dual function: it allows ambient air to enter the fuel tank to displace fuel as it is consumed, preventing a vacuum from forming, while simultaneously preventing liquid fuel from siphoning or being expelled through the vent line during flight maneuvers, climbs, or when the aircraft is parked on an unlevel surface. As a genuine OEM part, it ensures the precise functionality, material compatibility, and quality required for safe and reliable fuel system operation.

Key Features

• Positive Pressure Regulation: Acts as a one-way check valve to allow air into the tank system as fuel is consumed, ensuring an uninterrupted flow of fuel to the engine under the force of gravity.
• Fuel Siphon Prevention: The valve is designed to prevent the siphoning of fuel overboard, a critical function that conserves fuel, protects the environment, and prevents damage to hangar floors and ramp surfaces.
• Pressure Relief: Incorporates a precisely engineered weep hole or bypass mechanism. This allows the tank to relieve pressure built up from thermal expansion of the fuel (e.g., when the aircraft sits in the sun), preventing structural stress on the fuel tank.
• OEM Certified Quality: Manufactured by Textron Aviation to the original factory specifications, guaranteeing the correct materials, spring rates, and flow characteristics for your specific Cessna model.
• Durable Construction: Built from materials designed to withstand continuous exposure to aviation fuels and atmospheric conditions without degradation, ensuring a long and reliable service life.

Technical Specifications

• Part Number: S2359-1
• Component Type: Fuel Tank Vent Check Valve (also referred to as a "flapper valve" or "BP valve")
• Function: Fuel system venting and anti-siphon
• Installation Location: Typically installed inside the fuel tank, connected to the main vent line.
• Material: Aerospace-grade metals and fuel-resistant sealing materials.
• Certification: FAA Production Approval

Aircraft Compatibility

The Cessna S2359-1 fuel vent valve is specified as original equipment on many of the most popular high-wing Cessna aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) to verify the correct part number for your serial number.

• Compatible Aircraft Models:
  • Skyhawk (172)
  • Skylane (182)
  • Stationair (206)
  • And other related Cessna models.

Applications

The S2359-1 is a key component for ensuring proper fuel system function and safety:

• Normal Operations: Essential for preventing fuel starvation by ensuring the fuel tank is always properly vented to ambient pressure.
• Fuel System Maintenance: A common replacement item during fuel tank repairs, bladder replacements, or when troubleshooting fuel venting or siphoning issues.
• Regulatory Compliance: Replacing a malfunctioning or obstructed valve is critical for maintaining the aircraft's airworthiness and compliance with safety directives.

Why Choose S2359-1?

An improperly functioning fuel vent system can lead to serious safety issues, ranging from fuel waste and environmental contamination to fuel starvation and engine failure. Using a genuine Textron Aviation S2359-1 OEM valve is the only way to ensure you are installing a component that functions exactly as the aircraft's fuel system was designed. The valve's specific pressure relief and check-valve characteristics are engineered for your airframe. For a component this critical to safety, there is no substitute for the quality, reliability, and peace of mind that comes from using a genuine OEM part.

Order Your S2359-1 Fuel Tank Vent Valve Now

Ensure the safety and reliability of your Cessna's fuel system with a genuine OEM vent valve. Visit Airparts.aero to order your S2359-1 today.

The S2359-1 fuel tank vent valve is a core component of the atmospheric balancing system in gravity-feed fuel tanks. As fuel is drawn from the tanks, the valve allows makeup air to enter, preventing negative pressure (a vacuum) that could collapse a fuel bladder or impede fuel flow. Conversely, as fuel warms and expands, the valve's calibrated pressure relief feature allows air and fuel vapor to escape, preventing over-pressurization of the tank. This precise, bi-directional functionality is critical. An obstruction, as noted in historical service documents, could lead to tank pressurization and potential structural failure, while a stuck-open valve can lead to significant fuel loss. Proper inspection and function of the S2359-1 is therefore a key airworthiness item.

Note: Installation of fuel system components must be performed by a certified A&P mechanic in strict accordance with the current Textron Aviation maintenance manual for the specific aircraft model. Always use new, approved gaskets and seals during installation.

MATERIAL COMPOSITION FLUOROSILICONE




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