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Thanks guys,
We've borescoped looking for scoring, but I hear you probably need the
cylinder(s) off to find it. The outlet of the breather is currently
forward of the aft end of the cowl flap, so we're currently extending it. If it dumps oil again, we'll separately plumb the turbo-related oil vents
that dump into the breather to make sure it's not going through there and
I may buy/borrow a wireless manometer (to avoid the wires/tubes into the
pressurized cabin issue) to monitor breather pressure in flight.
I know of no other way than to put a line from up the breather tube into
the region below the oil cap to measure pressure, and run it back to
either a manometer or airspeed indicator...
------Original Message------
From: Craig Jimenez
To: Fred Moreno
To: mcmess1919@yahoo.com
To: Clark Baker
Subject: [LML] Oil going overboard - TSIO-520WB
Sent: Jul 5, 2013 19:50
Clark, Steve, and Fred,
What do you recommend for monitoring crankcase pressure in various phases
of flight? I'd assume it's something that temporarily replaces the oil
dip-stick cap? Running wires into the pressurized cabin would be a pain
for a temporary test, but could be managed.
The TSIO-520WB on the left side of my P-Baron infrequently dumps about a
quart a minute out the breather (clean oil on the flaps). Twice happened
on initial climb, last time on low-power descent like you describe.
Basic
compression test good, did find that the breather outlet is in front of
the cowl flap exit, whereas on others it is a couple inches aft.
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