Definition
A component in an aircraft engine's lubrication system that traps contaminants — such as metal particles, carbon, and dirt — from the circulating engine oil before the oil returns to lubricate engine parts.
Plain English
It's a filter that cleans the engine oil as it flows through the engine, catching tiny bits of metal and dirt so they don't damage moving parts.
Context Anchor
Seen in engine system descriptions, maintenance records, and discussions about oil changes or engine condition.
Why Pilots Care
A dirty or clogged oil filter can restrict oil flow, leading to accelerated engine wear or sudden engine failure.
Analogy
It works much like a coffee filter: the liquid passes through, but unwanted solid bits are held back.
Intuition Check
An oil filter does not add oil or cool the oil. Its job is to catch unwanted particles in the oil.
Example Sentence 1
During the oil change, the mechanic cut open the oil filter and checked it for metal particles.
Example Sentence 2
After 50 hours of flight, the mechanic replaced the oil filter as part of routine engine service.