Copper in oil analysis ?

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.

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.

john smith wrote:

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.

Blackstone provides this explanation http://tinyurl.com/qo25a
--
Rich Badaracco
Director - Angel Flight North Carolina

john smith wrote:

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.

I have a single PDF page from Aviation Consumer's June 2006 article showing
a graph containing the metal in oil analysis and what produces it, as well
as what appears to be approximately normal results.

If the OP wants a copy of this, email me (remove the X from my attached
email address here) with a working address, and I will reply with this PDF.

--
Peter