P&W 500 Series Oil Consumption

March 2013

Due to the fact that oil interfaces with air in the bearing cavities and seals in the accessory gearbox assembly, you should be constantly monitoring the oil level and checking cowlings for leaks.

On some P&W 545A engines, we have seen a few problems in the gearbox seal area. Though it is fairly obvious when a starter-generator or alternator seal leaks, there are other seal areas that leak as much or more and are not as obvious.

As oil consumption approaches one quart in 10 hours, the hydraulic and fuel pump drains are where you need to focus. Oil leaking from these areas and exiting through drain tubes is frequently overlooked.

Another place to monitor is in the bypass duct and on the inner portion of the thrust reverser stangs. As always, reference the appropriate Pratt & Whitney maintenance manual for troubleshooting.


William Walker Engine Tech Rep Astra, Challenger, Citation, Embraer, Falcon, Global, Gulfstream, Hawker, King Air, Learjet, Westwind Battle Creek, MI (BTL) +1 269.969.8486

Related Tech Articles

Citation: When Was the Last Time Your Citation Had A Bath?
January 2022

Beech 1900 Aircraft: Temperature Sensor Failure
November 2021

Carbon Fiber + Aluminum + Water = Corrosion. Are The Panels Properly Sealed?
October 2021

Inspection Due Points And Tolerances
October 2021

What Is The Shelf Life And Warranty On My Collins Aerospace Goodrich® Pneumatic De-icers?
October 2021

View All Airframe Maintenance Tech Articles