Generally any such service will flag an inordinate reading on any material(s)
And then give a typical amount and your amount. They will assume unless told otherwise that they are looking at a piston engine. If you had submitted a previous sample they will compare to that. The form has places for engine serial number and hours etc. all pertinate info.

Lynn E. Hanover


<< Greetings,
 
I raised the tail to level, and drained another 12 oz of oil from the pan.
I put a layer of plastic wrap on a white paper plate, and poured some of the
oil on it.  The oil looks absolutely free of any sort of metal particles.
I also took a piece of wire as Leon suggested, and scraped the bottom of the
pan.  I got no residue, flakes, gunk, etc.   

Before raising the tail, I turned the prop through a few times quickly, to
feel the compression.  The hose from the front cover was loose, and hanging
from the engine, and I noticed that it pumped a few ounces of oil onto the
pan below, so there must have still been some oil in the system.   At this
point, I'm more convinced than ever that the engine is undamaged.  I may go
ahead and send the remaining oil out for analysis as a final test, but I'm
almost sure at this point that I'll just run it like it is to see if it
appears OK.   

Since I've never use any oil analysis service, I have a question.  I've
always understood that this was something you did routinely, to notice when
some extra wear starts.  In other words, the results are based on a baseline
that you established when the engine was working well.  Since so many people
do this with Lycomings, there's a pretty good bank of data to compare to,
even if your only sent in one sample.  Do the oil test folks have a solid
idea what's "normal" for a rotary engine?  Will this test absolutely show if
something is wrong?

 

Thanks,

Rusty (still have a lot of work to do, even if the engine is OK)


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