Thread: Copper in oil analysis ?
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Old August 17th 06, 01:32 PM posted to rec.aviation.ifr,rec.aviation.owning
john smith
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Default Copper in oil analysis ?
In article . com,
wrote:

Peter wrote:
I've just had a big increase in copper; wonder where copper comes
from. The engine is an IO-540-C4D5D, 500 hrs since new in 2002.

I had the same thing happen. Copper comes from brass bushings. In my
case the wrist pin broke in the middle and the bushing was being
destroyed. I am not sure if there is any other brass in the engine.

Aviation Consumer had a really good article on sources for all the
metals in an engine and their relationship to quantities found in engine
oil analysis. This appearred back in the 80's or 90's.