 First Emergency (Long post)
A Lieberman wrote:
> Sydney Hoeltzli wrote:
> Couple of questions, a mechanic I am not....
Me neither caveat lector
> Even though I am asking questions, I am getting my A&P to get a good
> look at the engine and give me recommendations when I get the plane back
> to my home based FBO.... What you cannot see can hurt if one is not too
> careful.....
Allen, I already responded in email because I didn't realize that
was just a copy of a post.
But for the rest of the group: the problem with this approach
is that if there is a problem such as metal from the valve stuck
elsewhere in the engine, by the time you get the plane back to
your home base FBO it will be far too late.
I would suggest calling Lycoming or a good overhaul shop like
Penn Yan, tell them you had an exhaust valve break and much of
the metal is un-accounted for, and ask what they suggest in the
way of checks.
> If the other cylinder walls were scored from fragmented metal, would
> this show up on a compression test?
Not necessarily to my understanding. It will depend upon
where they are scored and where the compression test is done
(usually only at one location, "top dead center")
> She said to expect metal for the next two oil
> changes, she recommended doing an oil change in 25 hours, which I will
> have done.
We have now broken in 3 cylinders. All three broke in in less
than 10 hrs based on EGTs/CHTs. At 10 hrs we changed the oil.
Subsequent oil changes had no metal in filter or on SOAP (oil
analysis). FWIW.
Good luck,
Sydney
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