• Cleans oil returning to sumps or feeding accessories to reduce wear on gears and bearings.
  
  

• Filters air in environmental or bleed systems where a cartridge element is specified.
  
  

• Prevents abrasive or fibrous contamination from entering the pump inlets during operation.
  
  

• Keeps fine contaminants out of pressure and flow sensors to ensure accurate readings.

• How often should it be replaced?

Replacement interval is defined by the aircraft AMM or operator maintenance program, also replace sooner if inspections show heavy contamination or increased pressure drop.

• How should I inspect the element before fitment?

Check the trace paperwork and part number, ensure media and seals are clean and undamaged, and confirm the element is free of dents, tears, or contamination.

• How do I verify system performance after replacement?

Perform the AMM functional and leak/flow checks required for the affected system and verify normal pressure/flow readings before returning to service.