SL61173 - Superior Air Parts FAA-PMA Oil Pressure Housing Gasket

SL61173 – Superior Air Parts FAA-PMA Oil Pressure Housing Gasket

Available now on the Airparts.aero Marketplace.

Overview

The Superior Air Parts SL61173 is a premium, FAA-PMA approved gasket, expertly engineered to provide a perfect, leak-proof seal for the oil pressure screen housing (or suction screen) on the vast majority of Lycoming piston aircraft engines. This flight-critical gasket is designed to prevent the leakage of high-pressure engine oil from this crucial maintenance access point. Manufactured by Superior Air Parts, a leader in high-quality PMA components, the SL61173 is fabricated from an advanced rubber-fiber composite material to ensure exceptional durability and sealing performance in the demanding high-temperature, high-pressure environment of the engine accessory case.

Key Features

• Advanced Composite Gasket Material: Fabricated from a specialized rubber-fiber composite. This material is specifically formulated to be impervious to modern aviation oils (both mineral and synthetic) and to resist compression set and thermal degradation, ensuring a reliable seal that lasts between service intervals.
• Positive High-Pressure Seal: Engineered to provide the ideal amount of "crush" when the housing is torqued to specification. This allows the gasket to conform to any microscopic irregularities on the mating surfaces of the engine case and screen housing, creating a positive seal against high-pressure oil.
• Single-Use Integrity: Designed as a mandatory single-use component. The initial compression creates a perfect mated seal; once the housing is removed, the gasket has taken a permanent set and will not provide a reliable seal if reused.
• Direct OEM Replacement: A fully certified, direct replacement for Lycoming OEM part numbers 77412 and LW-13385, offering equivalent or superior performance with a strong value proposition.
• Precision Die-Cut Manufacturing: Each gasket is die-cut to the exact dimensions and bolt-hole patterns of the Lycoming oil screen housing, guaranteeing a perfect fit and eliminating any risk of misalignment or extrusion.

Technical Specifications

• Part Number: SL61173
• Manufacturer: Superior Air Parts
• Component Type: Oil Pressure Screen Housing Gasket
• Material: Rubber-Fiber Composite
• OEM Replacement for: Lycoming P/N 77412 and LW-13385
• Primary Fluid Compatibility: Petroleum and Synthetic Based Aviation Lubricating Oils
• Certification: FAA-PMA

Aircraft Compatibility

The Superior Air Parts SL61173 is the specified FAA-PMA replacement gasket for the oil pressure/suction screen housing on most popular Lycoming piston engines, powering thousands of aircraft worldwide.

• Common Engine Series:
  • O-235
  • O-320, IO-320, LIO-320
  • O-360, IO-360, LIO-360, AIO-360, HIO-360
  • O-540, IO-540, TIO-540, LIO-540, AEIO-540
  • And many other Lycoming models.

Applications

The SL61173 is an essential component for routine engine maintenance and overhaul:

• Oil Screen Inspection: A mandatory replacement part whenever the oil pressure screen housing is removed to inspect the "last chance" filter for metallic debris—a critical step in monitoring engine health, typically performed at every oil change.
• Preventing External Oil Leaks: The sole component responsible for sealing this pressurized joint. A failed gasket will result in a messy and potentially hazardous external oil leak.
• Engine Overhaul: A standard component included in all major engine overhaul gasket kits for use during the final assembly of the accessory case.

Why Choose SL61173?

An external oil leak from the pressure side of the lubrication system is a serious safety concern. The SL61173 gasket from Superior Air Parts offers a high-quality, cost-effective, and FAA-PMA certified solution. Superior has a long-standing reputation for producing top-tier engine components that mechanics and engine builders trust. Using their new, certified gasket every time the oil screen is serviced ensures a leak-free joint and the peace of mind that comes from using a part engineered for performance and reliability.

Order Your SL61173 Gaskets Now

Ensure a leak-free, airworthy engine with high-quality, FAA-PMA certified gaskets from a leader in piston engine components. Visit Airparts.aero to order your Superior Air Parts SL61173 gaskets today.

The oil pressure screen housing creates a junction that must be both sealable and serviceable. The SL61173 gasket is engineered to facilitate this. Its rubber-fiber composite material is designed to have a specific compressibility and recovery rate. When the housing's cap screws are torqued, the gasket compresses, filling the microscopic voids in the metal surfaces to create a seal. The material's resistance to "creep relaxation" is critical; it must maintain its outward sealing force against the mating surfaces over time, even while subjected to constant heat and pressure. This ensures that the clamping force provided by the fasteners is not lost due to gasket degradation, which would otherwise lead to a leak.

Note: This is a single-use gasket. It must be replaced every time the oil screen housing is removed. Ensure both mating surfaces on the engine case and the housing are clean, dry, and free of old gasket material before installation. Tighten the housing or cap screws to the torque value specified in the current Lycoming maintenance manual or service publication.

FAA-PMA Eligibility:   [ Click Here ]

Fits the following engine models:

Lycoming™

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