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This used to happen to the old Lou Ross psru.
Torsional effects. Origin was the pilot bearing. Looking at your pic, aren't I
seeing streak origin in pilot area? Can't tell.
-al wick
----- Original Message -----
Sent: Tuesday, March 16, 2010 7:18
PM
Subject: [FlyRotary] Re: RD2-C Flywheel
Adapter Plate
I've never encountered this before but I'd remove the
damper, and examine the streaks under a microscope or 10x loop.
Obviously you want to check for looseness of the rivets. Try gripping
the shop head with vice grips and see if you can turn the rivet in the
hole. If yes, return the damper to me and I'll evaluate & rework it
as needed.
Tracy
On Tue, Mar 16, 2010 at 10:08 PM, Mark Steitle <msteitle@gmail.com> wrote:
Tracy,
The first time I noticed the streaks I just cleaned them off.
They may have be caused by corrosion X used previously, but I have no
way to tell. Approx. 2-3 hours of running have occurred since I first
wiped it clean and reinstalled the psru and I have not used any corrosion X
or anything else that could cause the streaks to reappear. I've
attached a picture of the other side which shows similar streaking.
So, my guess is they are aluminum streaks. Assuming they are
smoking rivets, what's the recommended fix?
Mark
I get similar looking streaks caused by the corrosion X that
I spray around in that area to prevent rust & corrosion. But if
that is aluminum dust instead of oil, it requires immediate
attention. Are you able to tell?
Tracy
This post is directed toward those of you that have a few hundred
hours or more on your RD2-x gearbox. I'm getting "smoke" streaks
leading out radially from the circle of rivets on the flywheel adapter
plate on my 20B. Do others find these streaks on their adapter
plates? I'm wondering if the rivets are working loose and need to
be replaced or upgraded. Maybe I need a beefier adapter plate.
Am I worrying over nothing, or is this something that is headed
for an in-flight failure?
Mark S.
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