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Date: Tue, 23 Aug 2005 14:35:22 -0400
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Subject: RE: [LML] TSIO-550 Critical Service Bulletin
Thread-Topic: [LML] TSIO-550 Critical Service Bulletin
Thread-Index: AcWn6KZuiwHPmndbS+myZDqYj5uHSAAEXZbw
From: "George Braly" <gwbraly@gami.com>


"... caused some problems."

I know one Malibu owner who had the #4 piston fail in flight.  The crack
propagated from the cross-bar on the stamped "4" which was over the
piston pin (where it is NOT supposed to be, according to the service
bulletin.)

I have the JPI engine download file from the last flight.

The owner did a marvelous job of dead sticking the airplane from about
16,000 feet.  Wife was on board, as I recall.

The owner hired an engine expert to attend the FAA/NTSB tear down
inspection.

At the time, TCM was blaming it all on 'leaning' - - until the engine
expert hired by the owner pointed out that the crack started at the "4"
and went across the piston.

The owner had already ordered and installed a new engine by the time of
the tear down inspection.

At the inspection,  TCM said they had "already fixed the problem".  They
gave the owner a recent date after which the fix had been incorporated.

The owner called his shop.  The bore scoped his pistons.  His new engine
had been built before the 'fix' and had the "4" stamped over the piston
pin, just like the failed engine.  Owner was not happy.

TCM had to replace the pistons on his new engine.

Regards,


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
erosiak@comcast.net
Sent: Tuesday, August 23, 2005 8:43 AM
To: Lancair Mailing List
Subject: [LML] TSIO-550 Critical Service Bulletin

Am I the only one who missed the July 2004 Critical Service Bulletin on
the TSIO-550??? I was surfing the Continental site Friday when I
happened to check out the service bulletin area and there it
was.....CSB04-6.=20

If you have a TSIO-550 manufactured or rebuilt between 04/28/1998 and
09/11/2003 this CSB applies to you. It seems that some pistons were
"position stamped" above the piston ring bore which has caused some
problems. The CSB is written in typical nebulous speak in its
description which is vague at best. However, the main issue seems to be
engines running hot (excessive heat as they put it).=20

I would estimate that 200 engines are involved (there are serial
numbers). The CSB requires a borescope check of the engines "within 25
hours or at the next 100 hour or annual inspection". And, then at each
100 hours thereafter until the pistons are changed out for whatever
reason. They are looking for "excessive heat indications or cracking" in
a specific area on the piston.

I was never notified, so much for being registered with Continental as
the engine owner.=20

If you are affected, PLEASE send me an email off list so I can keep
track of how many of us there are. As far as I am concerned it is
unacceptable that we should have to live with a 100 check to determine
if our pistons are cracked! The link to download the PDF is listed
below.

Ed Rosiak
Super ES

http://www.tcmlink.com/serviceBulletins/index.html

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