X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4169941 for flyrotary@lancaironline.net; Thu, 18 Mar 2010 00:58:15 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100318045741.GJOR19579.fed1rmmtao103.cox.net@fed1rmimpo01.cox.net> for ; Thu, 18 Mar 2010 00:57:41 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo01.cox.net with bizsmtp id uUxf1d00C4S1t5C03UxgrZ; Thu, 18 Mar 2010 00:57:40 -0400 X-VR-Score: -100.00 X-Authority-Analysis: v=1.1 cv=9X1BeRvGVdXikaVgI7mHUqmIOlosh/BCISq12UegNM8= c=1 sm=1 a=S4hI_GMu8LoA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=pGLkceISAAAA:8 a=UretUmmEAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=R4-g1X3L1yyha8U1XJoA:9 a=IMyQfuEJJKbwcP-3V-4A:7 a=RtePnfY67idOLCQgfAwvjNzrFcMA:4 a=CjuIK1q_8ugA:10 a=5zrLeAV0Z70A:10 a=MSl-tDqOz04A:10 a=iVkDmfvjeKcA:10 a=oY49l6w7Ud-Z7a_sQV4A:9 a=3qslXPoMRxdS9asGEAsA:7 a=TSu2IqBD2qbfo1FjyTt086s3xg4A:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: RD2-C Flywheel Adapter Plate Date: Wed, 17 Mar 2010 21:57:12 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0000_01CAC61C.CCB1AAA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: AcrFeDuXXV47T5BzS+iYQlK4Yq1rhQA5W/Qg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0000_01CAC61C.CCB1AAA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable At the airport today I decided to check whether my RD1B drive adapter = plate had streaks from the rivets as well. It does. I didn't disassemble anything so could only look at those that could be seen with a light and = a mirror through the holes in the flywheel that are not blocked by the = counter weight - IOW, I guess it was 4 rivets that I checked. All had the dark streak going radially outward, similar to what Mark showed in the photo. = On the 'head side' only two of the rivets had a very faint sign of discoloration toward the outside. =20 =20 There is no sign of any looseness or relative movement whatever of the plates. =20 Mark; have you had a chance to examine more closely? =20 Al =20 Subject: [FlyRotary] Re: RD2-C Flywheel Adapter Plate =20 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, =20 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 =20 Mark S. Austin =20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 =20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 ------=_NextPart_000_0000_01CAC61C.CCB1AAA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

At the airport today I decided to = check whether my RD1B drive adapter plate had streaks from the rivets as = well.  It does.  I didn’t disassemble anything so could only look at = those that could be seen with a light and a mirror through the holes in the = flywheel that are not blocked by the counter weight – IOW, I guess it was 4 = rivets that I checked. All had the dark streak going radially outward, similar to = what Mark showed in the photo. On the ‘head side’ only two of the = rivets had a very faint sign of discoloration toward the outside. =  

 

There is no sign of any looseness = or relative movement whatever of the plates.

 

Mark; have you had a chance to = examine more closely?

 

Al

 

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 <msteitle@gmail.com> 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?  

 

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 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 <msteitle@gmail.com> 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?  

 

Mark S.

Austin

 

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