3059253-01 - Pratt and Whitney Oil Filter Element Option IC

3059253-01 – Pratt & Whitney Canada OEM Oil Filter Element (Option IC)

Available now through the AirParts Aero marketplace.

Overview Section

The Pratt & Whitney Canada 3059253-01 is a high-performance Main Oil Filter Element designed for the PT6A turboprop engine series. As a critical component of the engine’s lubrication system, this filter is responsible for capturing carbon deposits (coke), metallic wear particles, and other contaminants that accumulate during high-temperature turbine operations.

This specific variant is identified as Option IC, signifying its compatibility with specific oil filter housing configurations and service bulletins. Unlike standard paper filters, the 3059253-01 utilizes a sophisticated wire-mesh or depth-loading media (depending on the revision) designed to handle the high flow rates and extreme pressure differentials characteristic of the PT6A’s "dry sump" oil system.

Key Features Section

• Genuine P&WC OEM Quality: Manufactured to the strict tolerances required to maintain the reliability of the PT6A power section and reduction gearbox.

• High-Temperature Resistance: Engineered to withstand the intense thermal environment of turbine engine oil, which can reach peak temperatures far exceeding piston engine capabilities.

• Precision Filtration (Option IC): Specifically calibrated for the scavenger and pressure-side filtration requirements of mid-to-high power PT6A variants.

• Bypass-Resistant Construction: Built with a reinforced internal core to maintain structural integrity during cold-weather starts when oil viscosity is at its highest.

• Contaminant Analysis Compatibility: Designed to trap debris in a manner that allows for effective "Filter Patch" analysis during scheduled inspections, providing early warning of internal component wear.

• Corrosion-Resistant End Caps: Precision-machined metal end caps ensure a perfect seal within the filter housing, preventing "dirty oil bypass."

Technical Specifications Section

Aircraft Compatibility Section

The 3059253-01 is a mission-critical part for many of the most popular turboprops in the AirParts Aero network:

• Beechcraft King Air: Standard maintenance item for the King Air 90, 200, and 300 series.

• Cessna Caravan: Utilized in the Cessna 208 and 208B (Grand Caravan) PT6A-114A and -140 engines.

• Pilatus PC-12: Compatible with the high-utilization PT6A-67 series powerplants.1

  
  

  
  

• SOCATA TBM: Essential for the TBM 700, 850, and 900 series lubrication circuits.

• Agricultural Aircraft: Found in the Air Tractor AT-502/602/802 and Thrush turboprop variants.

Technical Applications & Safety

In the PT6A, the oil filter is more than a cleaner; it is a diagnostic tool. Because the PT6A uses many rolling-element bearings (ball and roller), any internal failure will immediately shed metallic debris into the oil. The 3059253-01 captures this debris before it can be pumped into the propeller governor or the critical bearings in the power turbine.

Safety Warning: Never "clean and reuse" a 3059253-01 element unless specifically authorized as a washable mesh type in the EMM. Most modern -01 variants are designed for single-use. Reusing a filter can lead to a "media breakthrough" where the filter itself disintegrates, causing a total loss of oil pressure and catastrophic engine failure.

Technical Engineering Insight

The engineering value of the 3059253-01 lies in its Delta-P (Differential Pressure) Management. In the PT6A, the oil filter housing includes a bypass valve. If the 3059253-01 is not manufactured with the exact flow-restriction parameters of the OEM design, the bypass valve may open prematurely, allowing unfiltered oil to circulate through the engine.

The Option IC designation ensures that the filter’s "efficiency rating" matches the specific oil jet sizes used in the reduction gearbox. By choosing the genuine P&WC part through AirParts Aero, you ensure that the filter media does not react chemically with synthetic turbine oils (like AeroShell 500 or Mobil Jet II), preventing "media migration" into the delicate bearings of the gas generator.

Installation & Maintenance Addendum

1. O-Ring Replacement: Always replace the housing packing (O-ring) with the part number specified in the IPC (often MS29513 or AS3582 series) to prevent high-pressure oil leaks.

2. Filter Inspection: Upon removal, always "cut open" the filter or perform a wash-test to check for metallic flakes. Gold/bronze flakes indicate bearing cage wear; magnetic steel flakes indicate gear or race failure.

3. Torque: Ensure the filter housing cap is torqued to the specific value listed in the EMM to prevent safety-wire breakage or housing thread damage.