X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 22 Jul 2013 09:27:24 -0400 Message-ID: X-Original-Return-Path: Received: from [208.113.200.5] (HELO homiemail-a82.g.dreamhost.com) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6382560 for lml@lancaironline.net; Mon, 22 Jul 2013 09:14:46 -0400 Received-SPF: none receiver=logan.com; client-ip=208.113.200.5; envelope-from=r.rickard@rcginc-us.com Received: from homiemail-a82.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a82.g.dreamhost.com (Postfix) with ESMTP id 827D7282065 for ; Mon, 22 Jul 2013 06:14:11 -0700 (PDT) Received: from [192.168.1.24] (24-107-103-44.dhcp.stls.mo.charter.com [24.107.103.44]) (Authenticated sender: r.rickard@rcginc-us.com) by homiemail-a82.g.dreamhost.com (Postfix) with ESMTPA id 1215F28205F for ; Mon, 22 Jul 2013 06:14:10 -0700 (PDT) From: Bob Rickard Content-Type: multipart/alternative; boundary="Apple-Mail=_9CBAB424-BF3E-450E-880F-3B6666E56D5E" X-Original-Message-Id: Mime-Version: 1.0 (Mac OS X Mail 6.5 \(1508\)) Subject: Re: [LML] Potential Problem-Engine Vibration X-Original-Date: Mon, 22 Jul 2013 08:14:10 -0500 References: X-Original-To: "Lancair Mailing List" In-Reply-To: X-Mailer: Apple Mail (2.1508) --Apple-Mail=_9CBAB424-BF3E-450E-880F-3B6666E56D5E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Prop is HC-H3YF-1RF with TSIO-550E on L-IVP Bob On Jul 21, 2013, at 11:13 PM, Colyn Case = wrote: > Bob , Can you please specify the model number of the blades and hub? = More than one exist which match "78 inch Hartzell" >=20 > Colyn >=20 > Sent from my iPhone >=20 > On Jul 21, 2013, at 11:54 PM, Robert R Pastusek = wrote: >=20 >> Gentlemen, >> =20 >> This is an alert for a potentially serious problem with the = Continental IO/TSIO-550 engine/Hartzell 78=94 Scimitar propeller = combination commonly used on Lancair aircraft. Please appreciate that = this is from a very small data sample, and analysis is on-going, but = it=92s important enough to share what we now know.=20 >> =20 >> Lancair (N619SJ) owner Bob Rickard called last week to advise that = he=92d discovered a major crack in his crankshaft at the propeller = flange and wanted to alert other owners flying the above engine/prop = combination of his problem.=20 >> =20 >> Bob has been chasing a random vibration in his airframe since he = bought the aircraft three years/approximately 500 hours ago. The = =93standard suspects=94 of prop balance/run-out, engine mount/isolators, = engine contact with the cowling, etc. had been systematically ruled out = over time. In frustration, and unwilling to just ignore it, Bob ordered = a new MT 4-blade to replace the Hartzell, remaining very uncomfortable = with the vibration and unable to think of any other possible fixes. Part = of Bob=92s discomfort was based on the fact that he=92d talked = extensively to Ed Smith who had similar vibration issues with the same = engine/propeller combination. (Ed=92s N9JE experienced an in-flight = crankshaft failure/departure of the prop in 2010; Ed successfully = dead-sticked the airplane onto a beach.) >> =20 >> Bob=92s recent discovery of the cracked crankshaft was made when the = Hartzell was removed for replacement with a new MT prop. At the time of = removal/discovery, the engine had just more than 100 flight hours since = major overhaul. The crankshaft had been checked for cracks at overhaul, = and the actual eddy current test results were still available showing no = cracks or irregularities at that time. Bob believes that the crack = developed within the last 100 flight hours as a result of long-term = exposure to harmonic vibration, and that this vibration could be a = result of an incompatibility between his big-bore Continental and this = specific Hartzell prop. He notes that although this is an =93FAA = approved=94 engine/propeller combination, he has talked to other = airplane owners flying this combination who have/are experiencing = similar vibration issues.=20 >> =20 >> We understand that Continental and the FAA have been notified of this = problem, but we have no additional information at this time. LOBO = expects to publish a more detailed report on this in the next monthly = newsletter, but both Ed Smith and Bob Rickard felt this discovery was = worth making immediate notification about. Specifically, any unusual or = new engine vibration should be cause for immediate attention. Bob = considers himself very lucky to have caught the crack before in-flight = failure.=20 >> =20 >> We=92ll devote a few minutes to share what we know/answer questions = at our LOBO Safety Forum to be held at 1300 in Forum Pavilion 2, Monday, = 29 August, at AirVenture. Bob Rickard won=92t be available to discuss = this at our safety forum, but you can email him at = r.rickard@rcginc-us.com. LOBO would also appreciate an email or call = (rpastusek@htii.com 757-286-4802) if you are experiencing similar = problems. >> =20 >> Thanks, >> Bob Pastusek >> For LOBO Bob Rickard President, Rickard Consulting Group, Inc. r.rickard@rcginc-us.com --Apple-Mail=_9CBAB424-BF3E-450E-880F-3B6666E56D5E Content-Type: multipart/related; type="text/html"; boundary="Apple-Mail=_DCB8D590-94D5-45D8-93BE-899856D22089" --Apple-Mail=_DCB8D590-94D5-45D8-93BE-899856D22089 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Prop = is HC-H3YF-1RF with TSIO-550E on = L-IVP

Bob


On = Jul 21, 2013, at 11:13 PM, Colyn Case <colyncase@earthlink.net> = wrote:

Bob ,   Can you please = specify the model number of the blades and hub?  More than one = exist which match "78 inch = Hartzell"

Colyn

Sent from my = iPhone

On Jul 21, 2013, at 11:54 PM, Robert R Pastusek = <rpastusek@htii.com> = wrote:

Gentlemen,
 
This is an alert for a potentially serious =
problem with the Continental IO/TSIO-550 engine/Hartzell 78=94 Scimitar propeller combination =
commonly used on Lancair aircraft. Please appreciate that this is from a =
very small data sample, and analysis is on-going, but it=92s important =
enough to share what we now know. 
 
Lancair (N619SJ) owner Bob Rickard called =
last week to advise that he=92d discovered a major crack in his =
crankshaft at the propeller flange and wanted to alert other owners =
flying the above engine/prop combination of his problem. =

 
Bob has been chasing a random vibration in =
his airframe since he bought the aircraft three years/approximately 500 =
hours ago. The =93standard suspects=94 of prop balance/run-out, engine =
mount/isolators, engine contact with the cowling, etc. had been =
systematically ruled out over time. In frustration, and unwilling to =
just ignore it, Bob ordered a new MT 4-blade to replace the Hartzell, remaining very uncomfortable with the =
vibration and unable to think of any other possible fixes. Part of Bob=92s=
 discomfort was based on the fact that he=92d talked extensively to Ed =
Smith who had similar vibration issues with the same engine/propeller =
combination. (Ed=92s N9JE experienced an in-flight crankshaft =
failure/departure of the prop in 2010; Ed successfully dead-sticked the airplane onto a =
beach.)
 
Bob=92s recent discovery of the cracked =
crankshaft was made when the Hartzell was =
removed for replacement with a new MT prop. At the time of =
removal/discovery, the engine had just more than 100 flight hours since =
major overhaul. The crankshaft had been checked for cracks at overhaul, =
and the actual eddy current test results were still available showing no =
cracks or irregularities at that time. Bob believes that the crack =
developed within the last 100 flight hours as a result of long-term =
exposure to harmonic vibration, and that this vibration could be a =
result of an incompatibility between his big-bore Continental and this =
specific Hartzell prop. He notes that =
although this is an =93FAA approved=94 engine/propeller combination, he =
has talked to other airplane owners flying this combination who have/are =
experiencing similar vibration issues. 
 
We understand that Continental and the FAA =
have been notified of this problem, but we have no additional =
information at this time. LOBO expects to publish a more detailed report =
on this in the next monthly newsletter, but both Ed Smith and Bob =
Rickard felt this discovery was worth making immediate notification =
about. Specifically, any unusual or new engine vibration should be cause =
for immediate attention. Bob considers himself very lucky to have caught =
the crack before in-flight failure. 
 
We=92ll devote a few minutes to share what we =
know/answer questions at our LOBO Safety Forum to be held at 1300 in =
Forum Pavilion 2, Monday, 29 August, at AirVenture. Bob Rickard won=92t be available to =
discuss this at our safety forum, but you can email him at r.rickard@rcginc-us.com. =
LOBO would also appreciate an email or call (rpastusek@htii.com 757-286-4802) =
if you are experiencing similar problems.
 
Thanks,
Bob Pastusek
For LOBO


Bob Rickard
President, = Rickard Consulting Group, Inc.
<= br class=3D"Apple-interchange-newline">

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