There is now an AD out on Lycoming Cranks that includes cranks they

just

installed to repair another AD. For 300 HP and up. The aircraft are

grounded

as of now and require a ferry permit to move to a repair facility.

These

are

high dollar aircraft and there will be hell to pay for a long time

before

hundreds of newer aircraft can be used again.

There are no AD's on Rotary engines.

Lynn E. Hanover.

Tracy Crook wrote:

Well, sort of.  There is a growing list of non-official ADs for the

rotary.

Rotary glider incident # 3 (Sigurd G.) in his Glastar proves that the
leading coil ballast resistor change is mandatory if you want to avoid a
definite failure.

We have had 3 separate tension bolt failures which definitely indicates

the

need to damp the vibrations.  (see my website for details on the fix I
used).

And the front cover oil passage O-ring is a known trouble spot.

The good news is that we don't have any ADs.   The bad news is that we

don't

have any ADs.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

Dean Head wrote:

Paul/Tracy/Group,
Kind of on this vein of thinking...One of the thoughts that continually
haunts me is that even though these engines are mechanically more simple
than conventional engines all of the components that we assemble around

them

are potential failure points. What if we started a document that compiled
the accumulated wisdom of all the group on potential problems they had
uncovered and the remedies? Also a section on ruggedizing the
installation(selection of connectors, wiring practices, heat shielding,
safety wiring, component inspections, etc.) As each of us work through our
individual installations we will be able to review, learn from and add to
such a document. Of course it should include "for educational purposes

only"

disclaimer!!!
Thoughts?
Dean Head

We have gone over most of this stuff in the past 4 1/2 years of the
newsletter.
We knew about the tension bolt problems and had a fix last summer
when Perry Mick broke a bolt. Some people choose to ignore the simple fix
and paid the price. There are a lot of messages on the ACRE NL CD about
many of the failure modes of the peripheral systems.

I am a bit behind on shipping the CD's as I am awaiting a shipment of
CD mailers. They should be in any day now.

If you would like to do the research and compilation let me know.
I'll post it on the ACRE NL web site.

Paul Lamar

Paul,

I would be interested in researching and compiling the information into a
single reference. I am going to go thru the exercise for my own education
anyway. When I get the CD I'll start with it. In the meantime I'll start
thinking of a structure and TOC.
Dean

 
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