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SB 08-6-1 Inspection

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blalmarz(at)embarqmail.co
Guest

Posted: Sun Jun 15, 2008 5:55 am Post subject: SB 08-6-1 Inspection

There are quite a few threads on this SB. Why don't we use this  

thread to keep track of what people find when they do the inspection?  

Just list A/C time and results and we can track the problem with one  

search. Blue Skys.



Barry Marz

18735 Baseleg AVE.

FT. Myers, Fl 33917

239-567-2271

blalmarz(at)embarqmail.com

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Sun Jun 15, 2008 8:34 am Post subject: SB 08-6-1 Inspection

Barry your point is dead on.  Many do not understand the urgency to

inspect (within 5) and to continue to inspect (every 25) until

compliance (at the very next Conditional).  A misread could have major

impact.  Share the word!



Few are getting to the root of the cause. Hopefully it was due to a

unique one of a kind, build situation. What is most important is not

allowing this alarming crack to become anything more than a simple

patch.



Stay safe.  Tim could best track those who have completed it and confirm

if more than a single aircraft was affected.  Sharing of what is being

found at Conditionals is of value to every single 10 builder.  This

group is great at the sharing.



John Cox

Oregon



--

rdoerr(at)kc.rr.com
Guest

Posted: Sun Jun 15, 2008 9:18 am Post subject: SB 08-6-1 Inspection

N519RV (40250)

Hobbs = 381.3, No cracks founds.  Looks like it did on day one!

Ray Doerr

---- Barry Marz <blalmarz(at)embarqmail.com> wrote: 

 	  Quote: 	
		   

 

 There are quite a few threads on this SB. Why don't we use this  

 thread to keep track of what people find when they do the inspection?  

 Just list A/C time and results and we can track the problem with one  

 search. Blue Skys.

 

 Barry Marz

 18735 Baseleg AVE.

 FT. Myers, Fl 33917

 239-567-2271

 blalmarz(at)embarqmail.com

pascal(at)rv10builder.net
Guest

Posted: Sun Jun 15, 2008 12:11 pm Post subject: SB 08-6-1 Inspection

I may be missing the point of everyone sending in hours and no structural 

crack reports and although this may be a great idea let's remember the Van's 

plane saw this at 500 hours with much of those hours for transition 

training. I sure would not expect many of us to see anything for a few more 

hundred hours, and if it's mostly straight and level with little stall  and 

landing (hard at that) practice maybe not until 600-750 or more hours.

I mentioned this before, Van's rarely sends parts out to us to strengthen 

what they consider a weakness in the design, so this must be a serious 

concern for the engineers at Van's. Is it going to take a plane to have a 

structural issue for us to heed their SB sooner than later?



--------------------------------------------------

From: "Bruce Lane" <bruce_a_lane(at)hotmail.com>

Sent: Sunday, June 15, 2008 10:35 AM

To: <rv10-list(at)matronics.com>

Subject: RE: SB 08-6-1 Inspection



 	  Quote: 	
		   



 N662G

 97 hours  TTSN

 First Flight = November 2007

 No cracks or other signs of fatigue found



 Bruce lane

 Virginia Beach, VA

 ---- Barry Marz <blalmarz(at)embarqmail.com> wrote:

> 

>

> There are quite a few threads on this SB. Why don't we use this

> thread to keep track of what people find when they do the inspection?

> Just list A/C time and results and we can track the problem with one

> search. Blue Skys.

>

> Barry Marz

> 18735 Baseleg AVE.

> FT. Myers, Fl 33917

> 239-567-2271

> blalmarz(at)embarqmail.com

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Sun Jun 15, 2008 1:06 pm Post subject: SB 08-6-1 Inspection

N220RV is a structural issue, hence their providing a SB.  It had far fewer hours on the airframe, than on N410RV.  They are not about to admit the material thickness might be spec'ed too thin or the "heat treatment" post fabrication was incorrect.  For those who have not yet installed F1010, there are several things that could be done to reduce the likelihood of a similar crack developing.



For those who have finished, 5/25/next Conditional should be the mantra.



Some may remember the post months ago about cracks in an initial fabricated piece and the words from the factory to just file it, build it and "forgetaboutit".  Don't hear that on this crack...do we?



If they want reinspections every 25 hours and the crack propagated this far (since the last Conditional), you know it showed some time ago and got missed.  So do the inspection but don't "forgetaboutit". And remember "Didn't find the crack Yet, will keep looking!"



John Cox



--

dmaib@me.com

Joined: 25 Apr 2006
Posts: 454
Location: New Smyrna Beach, Florida

Posted: Wed Jun 18, 2008 7:59 pm Post subject: Re: SB 08-6-1 Inspection

Finished opening everything up this evening. Not flying yet, so, of course, no issues with the bulkhead.

We did manage to easily remove the trim without getting into the tailcone. Did it all from the outside. Should get the doublers installed tomorrow and plan to have it all back together by Saturday. Drilling out 52 (?) rivets was the worst part, so far. I elongated a couple of holes a bit, so might have to install oversize rivets.

Would there be any problem installing a bolt or screw and lock nut in an oversize hole?

_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Jun 19, 2008 1:24 pm Post subject: SB 08-6-1 Inspection

dmaib(at)mac.com wrote:

 	  Quote: 	
		   



 Finished opening everything up this evening. Not flying yet, so, of course, no issues with the bulkhead.

 We did manage to easily remove the trim without getting into the tailcone. Did it all from the outside. Should get the doublers installed tomorrow and plan to have it all back together by Saturday. Drilling out 52 (?) rivets was the worst part, so far. I elongated a couple of holes a bit, so might have to install oversize rivets.

   

Not an answer for a purist, but depending on how bad it's off, a regular 
	


rivet will do just fine.  Unless, of course you have a lot of oversize 

rivets on hand ...... 

 	  Quote: 	
		   Would there be any problem installing a bolt or screw and lock nut in an oversize hole?

   

No problem .....just added weight.
	


Linn

 	  Quote: 	
		   --------

 David Maib

 RV-10 #40559

2eyedocs

Joined: 10 Jan 2006
Posts: 8

Posted: Thu Jun 19, 2008 3:04 pm Post subject: Re: SB 08-6-1 Inspection

I am sure I will show my vast knowledge of aluminum fatigue (or lack there of), but it seems if you cover with a plate, you would never see a future crack that may develop underneath.  I understand the plate is to strengthen the part to keep it from cracking.  Is there a chance of a crack forming with the plate riveted on?

Thanks, Mark

GenGrumpy(at)aol.com
Guest

Posted: Thu Jun 19, 2008 6:16 pm Post subject: SB 08-6-1 Inspection

Always a chance another crack will develop.....so.......future ACIs you  look at the other side (non-doubler side) as well as the doubler you  install.

  

 Hopefully, the engineering staff has done their homework and the doublers  will eliminate future crack possiblities....

  

 grumpy

 N184JM

  

 do not archive

  

 In a message dated 6/19/2008 6:09:30 P.M. Central Daylight Time,  2eyedocs(at)gmail.com writes:

  	  Quote: 	
		  -->    RV10-List message posted by: "2eyedocs" <2eyedocs(at)gmail.com>



I am    sure I will show my vast knowledge of aluminum fatigue (or lack there of), but    it seems if you cover with a plate, you would never see a future crack that    may develop underneath.  I understand the plate is to strengthen the part    to keep it from cracking.  Is there a chance of a crack forming with the    plate riveted on?

Thanks, Mark





Read this topic online    here:



http://forums.matronics.com/viewtopic.php?p=188685#188685

	


 

  



Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Jun 19, 2008 6:33 pm Post subject: SB 08-6-1 Inspection

I looked at the SB pictures, and I looked at my empcone ..... and for the life of me, I cannot figure out what's moving enough to cause the cracks.  There must be a lot of flexing going on back there!  I have no doubt in my mind that the thickness of the doubler will prevent any cracks from starting ...... or will prevent them from continuing if they're already there.  If you're still worried about the fix ...... bed the doubler in proseal and then rivet before it sets.

 Linn ..... 'tis a puzzlement.

 

 GenGrumpy(at)aol.com (GenGrumpy(at)aol.com) wrote: [quote]               Always a chance another crack will develop.....so.......future ACIs you look at the other side (non-doubler side) as well as the doubler you install.

    

   Hopefully, the engineering staff has done their homework and the doublers will eliminate future crack possiblities....

    

   grumpy

   N184JM

    

   do not archive

    

   In a message dated 6/19/2008 6:09:30 P.M. Central Daylight Time, 2eyedocs(at)gmail.com (2eyedocs(at)gmail.com) writes:

    	  Quote: 	
		  --> RV10-List message posted by: "2eyedocs" <2eyedocs(at)gmail.com> (2eyedocs(at)gmail.com)

     

 I am sure I will show my vast knowledge of aluminum fatigue (or lack there of), but it seems if you cover with a plate, you would never see a future crack that may develop underneath.  I understand the plate is to strengthen the part to keep it from cracking.  Is there a chance of a crack forming with the plate riveted on?

 Thanks, Mark

     

     

     

     

 Read this topic online here:

     

 http://forums.matronics.com/viewtopic.php?p=188685#188685

     

     

     	
   

    

   

   

   

      Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.

    	  Quote: 	
		  



 href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

 href="http://forums.matronics.com">http://forums.matronics.com

 href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	
 [b]

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Thu Jun 19, 2008 8:34 pm Post subject: SB 08-6-1 Inspection

A proper inspection views both sides.  In this case the opposite of the

doubler will reveal any migration down the road.  I am always amazed to

see builder's with cracks that do not document their length during a

Conditional.  At the next Conditional they go 'Yup, still there'.  Then

we measure it to create a baseline and find it has been slowly migrating

over the life of the airframe.



Stress relief and tortional transfer into the doubler are important

parts of the correction.  No one is commenting on the appearance that

the CNC relief groove for the flanges (two of them) seem to be larger

than offered on the virgin parts.  This could have been a manufacturing

crack which was treated by the builder (the factory) with deburring and

grinding prior to original assemblage.  A crack is a crack is a crack.

It is not going away.  It is coming back to play another day.



"Metal has memory".



Anyone want to play on a review of the pictures?



John Cox



--

PILOTDDS(at)AOL.COM
Guest

Posted: Sat Jun 21, 2008 9:23 am Post subject: SB 08-6-1 Inspection

728DD-No cracks found at 220 hours,will install the doublers at next annual.

**************

Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.

      (http://autos.aol.com/used?ncid=aolaut00050000000007)  [quote][b]

bob.kaufmann(at)cox.net
Guest

Posted: Sat Jun 21, 2008 10:06 am Post subject: SB 08-6-1 Inspection

104BK-No cracks found at 2005 hours.  Oops, that’s build time.  

   

Bob K  

     

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of PILOTDDS(at)aol.com

 Sent: Saturday, June 21, 2008 10:18 AM

 To: rv10-list(at)matronics.com

 Subject: Re: Re: SB 08-6-1 Inspection  

  

   

728DD-No cracks found at 220 hours,will install the doublers at next annual.

 

 

 **************

 Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.

 (http://autos.aol.com/used?ncid=aolaut00050000000007)    	  Quote: 	
		    http://www.matronics.com/Navigator?RV10-List 	
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Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Sat Jun 21, 2008 8:08 pm Post subject: SB 08-6-1 Inspection

[quote]   No cracks at 40 hours, installed parts at paint shop just    before paint.  Whew!

    

   Dick Sipp

   N110DV 40065

[b]

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