X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from outbound-mail.dca.untd.com ([64.136.47.15] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with SMTP id 4168466 for flyrotary@lancaironline.net; Tue, 16 Mar 2010 23:10:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.47.15; envelope-from=alwick@juno.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juno.com; s=alpha; t=1268795378; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=Message-ID:From:To:Subject:Date:Content-Type; b=lra95ssqglmEhstr2LKp905YKiGLSrA2r5QyUQ9aPT/BO9vPycDhB+scXVVAPcPDI EcR4kWpeV3/4ZbfnljkKtsEkzFU+h5Cr8rHC0NgQYmUUt2iB4UtcABwCeOsen29d7N 34BAvOrY5S2kB+Oo4RLwr1jBoDxfLgFBSVrwNKtk= Received: from Penny (c-98-246-117-71.hsd1.or.comcast.net [98.246.117.71]) by smtpout06.dca.untd.com with SMTP id AABF4AT9PAYS6EXJ for (sender ); Tue, 16 Mar 2010 20:09:33 -0700 (PST) Message-ID: <42D936D4031249ABBC05CDBC0BB13EF0@Penny> From: "Al Wick" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: RD2-C Flywheel Adapter Plate Date: Tue, 16 Mar 2010 20:09:33 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0185_01CAC544.980E9160" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18005 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 X-UNTD-BodySize: 9088 X-ContentStamp: 19:9:2944932482 X-MAIL-INFO:54411d391da599f9a5393db8395831851c212d0035e97d4c00218d788df9287d0c8d85dd18611861c9d96188c9f888c9590c3d4958355931397c5899b9a8f5f5ad11d19da11828616cd81888b5b5d5d848e891c169d9699c0d7c31989c09c9c1cc350d8c55f1551989fcacc5196ce5e5850d7d191d59c925b165498d2941fc41b8710c453c2d211d813939e1f99949c83d2c7cd179b1a5b9ad5ccdb9a91175fc9da875f5a9ac11dcd9 X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkJzkH2t6LQ5s6gzUP/mbY9G1HX+Q3ZVyiQ== X-UNTD-Peer-Info: 10.171.42.36|smtpout06.dca.untd.com|smtpout06.dca.untd.com|alwick@juno.com This is a multi-part message in MIME format. ------=_NextPart_000_0185_01CAC544.980E9160 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 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 = 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? =20 Mark=20 On Tue, Mar 16, 2010 at 9:00 PM, Tracy Crook = wrote: 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 On Tue, Mar 16, 2010 at 9:16 PM, Mark Steitle = wrote: 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? =20 Mark S. Austin -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0185_01CAC544.980E9160 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
This used to happen to the old Lou Ross = psru.=20 Torsional effects. Origin was the pilot bearing. Looking at your pic, = aren't I=20 seeing streak origin in pilot area? Can't tell.
 
-al wick
----- Original Message -----
From:=20 Tracy=20 Crook
Sent: Tuesday, March 16, 2010 = 7:18=20 PM
Subject: [FlyRotary] Re: RD2-C = Flywheel=20 Adapter Plate

I've never encountered this before but I'd  remove = the=20 damper, and examine the streaks under a microscope or 10x loop. =20 Obviously you want to check for looseness of the rivets.  Try = gripping=20 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=20 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.=20  They may have be caused by corrosion X used previously, but I = have no=20 way to tell.  Approx. 2-3 hours of running have occurred since = I first=20 wiped it clean and reinstalled the psru and I have not used any = corrosion X=20 or anything else that could cause the streaks to reappear. =  I've=20 attached a picture of the other side which shows similar streaking.=20  So, my guess is they are aluminum streaks.  Assuming they = are=20 smoking rivets, what's the recommended fix?  

Mark 
On Tue, Mar 16, 2010 at 9:00 PM, Tracy Crook <tracy@rotaryaviation.com> = wrote:
I get similar looking streaks caused by the = corrosion X that=20 I spray around in that area to prevent rust & corrosion.  = But if=20 that is aluminum dust instead of oil, it requires immediate=20 attention.  Are you able to tell?

Tracy

On Tue, Mar 16, 2010 at 9:16 PM, Mark Steitle <msteitle@gmail.com>=20 wrote:
This post is directed toward those of you that have a few = hundred=20 hours or more on your RD2-x gearbox.  I'm getting "smoke" = streaks=20 leading out radially from the circle of rivets on the flywheel = adapter=20 plate on my 20B.  Do others find these streaks on their = adapter=20 plates?  I'm wondering if the rivets are working loose and = need to=20 be replaced or upgraded.  Maybe I need a beefier adapter = plate.=20  Am I worrying over nothing, or is this something that is = headed=20 for an in-flight failure?  

Mark S.
Austin

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