7578659AM - PTI FAA-PMA Cleanable Oil Filter Element for PW100 JT15D PT6B Engines

7578659AM – PTI FAA-PMA Cleanable Oil Filter Element for P&WC Engines

Available now on the Airparts.aero Marketplace.

Overview

The PTI Technologies 7578659AM is a high-performance, FAA-PMA certified, cleanable and reusable engine oil filter element for a wide range of Pratt & Whitney Canada (P&WC) turboprop, turbofan, and turboshaft engines. This is a direct, airworthy replacement for the P&WC OEM part number 7578659. Unlike disposable media filters, this element is engineered with a robust, pleated, stainless steel wire mesh filtration medium. This advanced construction allows the filter to be removed, ultrasonically cleaned, inspected, and returned to service multiple times, offering a significant long-term reduction in total cost of ownership.

The precisely woven wire mesh provides an absolute filtration rating, capturing contaminants on its surface and protecting the engine's high-speed bearings, gears, and fuel control units from abrasive wear. A key advantage of the mesh design is the ease and accuracy with which captured debris can be analyzed, providing a clear and early indication of the engine's internal health. The element includes an integrated bypass valve as a critical safety feature. As a fully FAA-PMA approved part, the 7578659AM offers a safe, reliable, and economical alternative to disposable filters.

Key Features

• FAA-PMA Certified: Fully certified by the FAA as an airworthy replacement for P&WC P/N 7578659, guaranteeing fit, form, and filtration performance.

• Cleanable & Reusable: The all-stainless-steel construction allows for multiple cleaning and reuse cycles, providing significant cost savings over the life of the engine.

• Woven Stainless Steel Mesh: Utilizes a precision-woven CRES wire mesh that provides a consistent, absolute filtration rating and is impervious to the high temperatures and corrosive effects of turbine engine oil.

• Pleated for High Surface Area: The mesh is pleated to dramatically increase the effective filtration area, resulting in high flow rates, low pressure drop, and high dirt-holding capacity.

• Superior Debris Analysis: The surface-capturing nature of the mesh allows for easy removal and inspection of captured particles, making it an exceptional tool for engine condition monitoring.

• Integrated Bypass Valve: A calibrated safety valve ensures the engine is never starved of lubrication in the event the filter becomes fully clogged.

Technical Specifications

• Part Number: 7578659AM

• OEM Original Part Number: 3036376

• Alternate Donaldson FAA-PMA Option: 3034508WFC

• Component Type: Cleanable Engine Oil Filter Element

• OEM Manufacturer: PTI Technologies Inc. (A division of Parker Aerospace)

• Certification: FAA-PMA (Replaces Pratt & Whitney Canada P/N 7578659)

• Media Type: Pleated, Woven Stainless Steel Wire Mesh (e.g., CRES 304L or 316L).

• Application: Turbine Engine Lubrication System

Aircraft Compatibility

The 7578659AM is specified for use on a wide range of aircraft powered by the following Pratt & Whitney Canada engine series:

• P&WC PW100 Series (Turboprop): Found on the ATR 42/72, Bombardier Dash 8 (Q-Series), Embraer EMB 120 Brasilia, and others.

• P&WC JT15D Series (Turbofan): Found on the Cessna Citation I/II/V, Hawker 400 (Beechjet), and others.

• P&WC PT6B Series (Turboshaft): Found on helicopters such as the Agusta A119 Koala.

Note: This is a flight-critical engine component. The specific engine Illustrated Parts Catalog (IPC) for a given engine serial number is the final and absolute authority for determining part applicability.

Applications

• Contamination Control: Provides absolute-rated filtration of engine lubricating oil, protecting critical high-speed, close-tolerance components.

• Engine Condition Monitoring: The primary tool for capturing metallic debris for analysis, providing early warning of impending bearing or gear failure.

Why Choose 7578659AM?

The PTI 7578659AM offers a compelling combination of certified safety, long-term value, and enhanced diagnostic capability. The FAA-PMA certification guarantees that its performance and safety are equivalent to the original OEM part. For fleet operators and high-utilization aircraft, the reusability of this filter can translate into substantial savings on consumables over the TBO of an engine. Furthermore, the cleanability and clear presentation of captured debris make it a superior choice for proactive engine health monitoring, potentially allowing for the detection of a problem long before it becomes a catastrophic and far more expensive failure.

The engineering principle that maximizes the effectiveness of the 7578659AM filter element is the geometric amplification of surface area through pleating. A simple cylindrical mesh would have a very limited filtration area, leading to a high pressure drop (ΔP) and rapid clogging. By folding the stainless steel mesh into a tightly packed, accordion-like structure, the effective surface area is increased by an order of magnitude or more within the same volumetric footprint. This massively increased area results in a significantly lower face velocity of the oil as it passes through the media. According to Darcy's Law, pressure drop is directly proportional to fluid velocity. Therefore, the lower face velocity drastically reduces the overall pressure drop across the filter, increases its dirt-holding capacity before the bypass pressure is reached, and provides more efficient, gentle capture of contaminants without forcing them through the mesh pores.

Note: The 7578659AM is a flight-critical, cleanable component. The cleaning and inspection process is a maintenance function that must be performed by a certified A&P/IA mechanic or an approved repair station, strictly in accordance with the procedures outlined in the P&WC engine maintenance manual. This typically involves specialized ultrasonic cleaning tanks, back-flushing equipment, and microscopic inspection. An element that is found to be damaged, dented, or has permanently embedded contamination must be discarded and replaced.

Documentation

No public-facing OEM documentation was located for this specific part number. All authoritative technical data, installation procedures, cleaning criteria, and inspection limits are contained within the proprietary Pratt & Whitney Canada Maintenance Manuals for the PW100, JT15D, and PT6B series engines.