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Safety Alert WD-415 weldment

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ron.mcgann(at)baesystems.
Guest

Posted: Sun Sep 17, 2006 2:21 pm Post subject: Safety Alert WD-415 weldment

All,   

Here is a repost from Vic Syracuse to the VAF forum.  I have not seen the message on this list but think it is essential reading for all of us.  Thanks Vic for the heads up!  

"I thought I should let everyone know that yesterday during a preflight I noticed that the left trim tab had a little more slop in it than usual. I took off the trim cable access cover plate, and it came completely off, meaning the nut was broken from the wd-415 weldment. I know we have talked in the past about that particular piece not looking quite sturdy enough, and right now that looks to be the case. I have a little over 320 hours on the airplane. I did not notice it on my post flight Sunday, but on my preflight prior to my commute home yesterday.   

alk about a miracle, though, and the advantages of the RV community. I live at Mallard's Landing in Georgia, and so does Aaron Sims, another RV-10 builder who is not flying yet. Guess who's parts I got to borrow?    

So, I am replacing both mine and Aarons with the parts from Dave at Rivethead-aero.com. Ordered them and 4 new cover plates from Van;s last night. I would recommend to those of you who are flying that you check these regularly.  

Now, for my opinion on the actual safety if a failure occurs? I think the trim cables are pretty stiff. I did go ahead and make the 15 minute flight home with no problem. If both of them broke, we might have a different story, but that's only conjecture.  

Here's the link for the parts:   

<http://www.rivethead-aero.com/rv10_005.htm>   

Vic"     [quote][b]

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n223rv(at)wolflakeairport
Guest

Posted: Sun Sep 17, 2006 3:11 pm Post subject: Safety Alert WD-415 weldment

When  you take it apart, see if the nut is stainless and if the plate  is ferrous steel (use a magnet).  I had mine break before flight and  determined that if they are both stainless, you cannot break them.  But  there are a bunch of ones out there that are mixed metal and if you try to  bent it, the nut breaks right off.....

  

 We  are building a few RV-s at our airport and we checked  everyone's stock.  They were mixed.   I called Van's  and explained my findings, they replaced them for free but I don't know if they  did anything behind the scenes to fix the issue.

 -M

 [quote]   

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Tim(at)MyRV10.com
Guest

Posted: Sun Sep 17, 2006 3:51 pm Post subject: Safety Alert WD-415 weldment

I think the new parts would be great, but I've never had them

in hand.  For an alternative, see this link.

Either way, I personally wouldn't fly with the original parts

as shipped....stainless or otherwise.  Why not just make it more

surely safe?



See:

http://www.myrv10.com/N104CD/finishing/20051228/index.html



But those new parts do look great.  Mr. Cleaveland Mike...you

should enquire about being a reseller....would be a more common

order source.



Tim Olson - RV-10 N104CD - Flying

do not archive

Mike Kraus wrote:

[quote] When you take it apart, see if the nut is stainless and if the plate 

 is ferrous steel (use a magnet).  I had mine break before flight and 

 determined that if they are both stainless, you cannot break them.  But 

 there are a bunch of ones out there that are mixed metal and if you try 

 to bent it, the nut breaks right off.....

  

 We are building a few RV-s at our airport and we checked 

 everyone's stock.  They were mixed.   I called Van's and explained my 

 findings, they replaced them for free but I don't know if they did 

 anything behind the scenes to fix the issue.

 -M

 

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zackrv8

Joined: 14 Jan 2006
Posts: 133

Posted: Sun Sep 17, 2006 4:30 pm Post subject: Re: Safety Alert WD-415 weldment

Guys,



  Deems has a few pics of the trim tab weldment on his web site at

http://www.deemsrv10.com/album/CNC%20Parts/index.html



Also, I included a couple of pics of the part already mounted on my trim tab cover.



Zack

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_________________
RV8 #80125
RV10 # 40512

armywrights(at)adelphia.n
Guest

Posted: Sun Sep 17, 2006 6:15 pm Post subject: Safety Alert WD-415 weldment

All,  

Remember that when Vic completed his plane the parts available were only welded on the one side of the nut.  Since then the nuts come welded on both sides.  Good judgment always prevails, but with the new welded type there may be no structural reason to use the extruded aftermarket brackets.  

Of course, they would definitely add a degree or two of reliability to early failure, even if they don't increase the actual safety of the install.  For instance, did Van's perhaps design into the system the ability to overpower the weld if there were a control binding issue?  No way to do that with the extruded bracket.  

Rob Wright  

#392  

Wing Tips  

--

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mike(at)cleavelandtool.co
Guest

Posted: Mon Sep 18, 2006 6:17 am Post subject: Safety Alert WD-415 weldment

We have talked about this but have not made any progress thus far.



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barnettephillip(at)yahoo.
Guest

Posted: Mon Sep 18, 2006 11:07 am Post subject: Safety Alert WD-415 weldment

ordered the rivethead  extruded parts, as well as several of the other products he has- will be delivered today, so haven't seen the quality, but other folks say they're great.  After spending several hours on the horizontal stabilizer attach brackets, then misdrilling one of the holes, $20 for the set of HS brackets is just the right prove!

   

   

  phil

  RV10

  horizontal stabilizer

  KSLC



"McGANN, Ron" <ron.mcgann(at)baesystems.com> wrote:

  [quote]    All, 

  Here is a repost from Vic Syracuse to the VAF forum.  I have not seen the message on this list but think it is  essential reading for all of us.  Thanks Vic for the heads up!

  "I thought I should let everyone know that yesterday during a preflight I noticed that the left trim tab had a little more slop in it than usual. I took off the trim cable access cover plate, and it came completely off, meaning the nut was broken from the wd-415 weldment. I know we have talked in the past about that particular piece not looking quite sturdy enough, and right now that looks to be the case. I have a little over 320 hours on the airplane. I did not notice it on my post flight Sunday, but on my preflight prior to my commute home yesterday. 

  alk about a miracle, though, and the advantages of the RV community. I live at Mallard's Landing in Georgia, and so does Aaron Sims, another RV-10 builder who is not flying yet. Guess who's parts I got to borrow?

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LIKE2LOOP(at)aol.com
Guest

Posted: Wed Sep 20, 2006 1:19 pm Post subject: Safety Alert WD-415 weldment

In a message dated 9/17/2006 10:17:29 PM Eastern Standard Time, armywrights(at)adelphia.net writes:

  	  Quote: 	
		  when Vic completed his plane the parts available were only welded on the one side of the nut.  Since then the nuts come welded on both sides.  Good judgment always prevails, but with the new welded type there may be no structural reason to use the extruded aftermarket brackets. 	


     The all aluminum (after kit market) parts are MUCH thicker, more threads to grip, no weld to break (or adjacent weak metal) and have a much more solid base that will accept a countersink and allow the cover plate to be dimpled and flush riveted. This is a no brainer to buy the part for a few bucks and get peace of mind and a better part. 

  

 Steve

  

 Stephen G. Blank,DDS 

RV-10 #40499               Finishing the Elevators

Cessna 170b Flyer 



Port St Lucie, FL 

772-475-5556 cell

  [quote][b]

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