651540 - Donaldson FAA-PMA Engine Oil Filter

P170537 – Donaldson FAA-PMA Engine Oil Filter (Replaces Textron 651540 & Champion CH48110-1)

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The Donaldson P170537 is a premium, FAA-PMA certified engine oil filter from one of the world's leaders in advanced filtration technology. This spin-on canister filter is the direct, certified replacement for the original Textron (Cessna) part number 651540 and the current Champion OEM filter CH48110-1. It is engineered to meet or exceed the performance of the original components, providing superior protection for a wide range of Continental engines installed on iconic Cessna aircraft.

This filter is a flight-critical component designed to provide full-flow filtration of the engine's lubricating oil. It continuously removes harmful microscopic contaminants—such as metallic wear particles, carbon, and sludge—that can cause accelerated wear to the engine's precision-machined internal components. The P170537 incorporates essential safety features, including an internal bypass valve and an anti-drainback valve, and utilizes Donaldson's advanced filter media to ensure maximum engine protection and longevity.

Key Features

• FAA-PMA Approved Replacement: Fully certified by the FAA as a safe, airworthy, and direct replacement for Textron 651540 and Champion CH48110-1 filters.

• Made by a Global Filtration Leader: Manufactured by Donaldson, a company renowned for its research and development of high-performance filtration media and systems.

• Advanced Synthetic Blend Media: Utilizes a high-efficiency filter media with a high pleat count to maximize surface area, providing excellent dirt-holding capacity (DHC) and superior particle capture.

• Integral Safety Bypass Valve: A critical feature that guarantees oil flow to the engine even in the event of a completely clogged filter element, preventing catastrophic oil starvation.

• Anti-Drainback Valve: Prevents oil from draining out of the filter when the engine is shut down, ensuring rapid oil pressure development and reduced engine wear on the next startup.

Technical Specifications

• Part Number: P170537

• Component Type: FAA-PMA Engine Oil Filter Element, Spin-On Canister

• Manufacturer: Donaldson Company, Inc.

• Replaces: Textron P/N 651540, Champion Aerospace P/N CH48110-1.

• Filter Media: High-Efficiency Synthetic Blend Media.

• Internal Features: Pressure Relief Bypass Valve, Anti-Drainback Valve.

Aircraft Compatibility

The Donaldson P170537 is FAA-PMA approved for installation on a large number of Textron Aviation (Cessna) aircraft equipped with specific Continental engines. Common models include, but are not limited to:

• Cessna 180, 182, 185, and 188 (with O-470 series engines)

• Cessna 205, 206, and 207 (with IO-520 series engines)

• Cessna 210 (with IO-470 and IO-520 series engines)

• Cessna 310 (with O-470 and IO-470 series engines)

Crucial Note: The official FAA-PMA supplement for this part and the specific aircraft's Illustrated Parts Catalog (IPC) are the final authorities for verifying installation eligibility.

Applications

• Primary filtration for the engine lubrication system.

• Mandatory replacement item at every oil change or as specified by the aircraft's maintenance program.

Why Choose P170537?

Choosing the Donaldson P170537 FAA-PMA filter is a decision for quality, performance, and value. As an FAA-certified part, its safety and performance are guaranteed to be at least equal to the OEM filter. Donaldson's global leadership in filtration technology often results in media that can provide superior engine protection. For owners and operators, this provides an excellent, cost-effective option for critical engine maintenance, backed by a name that is synonymous with filtration excellence, without compromising on the certified safety required for flight.

The design of a certified aviation oil filter incorporates two critical, non-negotiable safety systems. The first is the filter bypass valve. This is a calibrated, spring-loaded poppet valve that remains closed during normal operation. Its purpose is to provide an alternate oil path in the event of a completely clogged filter element, a condition that would otherwise lead to total oil starvation and immediate engine seizure. The valve is engineered to open at a specific differential pressure (e.g., 12-15 psid), allowing unfiltered oil to flow directly to the engine. While unfiltered oil will cause accelerated long-term wear, it is infinitely preferable to the certain and immediate catastrophic failure caused by a complete loss of oil flow. The second system is the anti-drainback valve. This is typically a nitrile rubber diaphragm that seals the filter's inlet holes when the engine is shut down. This valve prevents the oil in the filter and the engine's upper galleries from siphoning back into the sump, ensuring that upon the next startup, these critical components are already primed with oil. This drastically reduces the time to establish normal oil pressure, minimizing engine wear during the critical startup phase.

Note: This is a flight-critical engine component. It MUST be replaced at every oil change or as directed by the maintenance manual. Before installation, a light film of clean engine oil must be applied to the rubber gasket. The filter should be hand-tightened and then torqued to the value specified in the maintenance manual (typically given as a fraction of a turn after gasket contact). The filter MUST be safety wired after installation. Installation must be performed by a certified A&P mechanic.

Documentation

The definitive part number applicability for this FAA-PMA component must be confirmed using the official FAA-PMA database and the Illustrated Parts Catalog (IPC) and maintenance manuals for the specific aircraft model.