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
Wrathall Mark wrote:
I have already done a fair bit of this on www.rotary.microcosman.com I wrote
an update last night to add five or six essays I have collected over the
last year, but haven't uploaded it yet as I forgot my FTP Password.
Matt Cosman, could you please resend the password to me at wrathall@aon.at
so I can update the site.
When I started this I always intended it to be a collective effort, rather
than just my opinion. Ed Anderson has written a few excellent articles for
it, as have others in this group and I have added a number of jems from
various people in this group. I welcome contributions which capture the best
practises arrived at by the group. If you write an HTML page it is great,
but simple text files are fine also.
I got started with a flurish of activity, but once I had hit all the points
I wanted to make, kind of ran out of ideas. What I do now is wait for a
thread to reach a conconclusion then save that for editing into an article.
I think I have all of our AD's up there:
Coil Resister (needs the warning banner)
Ross gearbox thrust bearings
Redundancy on automotive coil trigger FCU (Will be upload when I get my
password)
Tension bolts
Oil pump keyway
Front cover seal (Not yet uploaded).
Leak testing the coolant installation
These articles have a Warning banner. Only titles in the index which are
blue are linked to articles. The other are there for ideas of future
articles and as a help in structuring the site for me.
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