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  #1  
Old 08-15-2012, 12:56 PM
dougweil's Avatar
dougweil dougweil is offline
 
Join Date: Jun 2005
Location: Hudson, WI
Posts: 260
Default Crack in VS attach plate

Hi all:

Our local FBO was doing an inspection on an RV-9A and found this crack in the vertical stab attach plate (F-781 on my RV-7... could be F-981 on the 9A). I know nothing else about it and I am not familiar with this aircraft. Just thought I would share the photo. It might be a wise inspection item to include in a condition inspection.



Note sure about the elongated holes either.



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Doug Weiler

Hudson, WI
president, Twin Cities RV Builders Group
RV-4, sold
RV-7 completed and flying N722DW, 930 hours
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  #2  
Old 08-15-2012, 02:32 PM
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agirard7a agirard7a is offline
 
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Location: Newport, RI
Posts: 740
Default ??

Larry, why would you assume this? Something I'm
missing? This is now the second post of a similar
crack discovery in the same general area. Something Vans
should be looking into?
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Al Girard, Newport, RI
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  #3  
Old 08-15-2012, 02:35 PM
terrykohler terrykohler is offline
 
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Posts: 1,044
Default Just started my Condition Inspection

Quote:
Originally Posted by LARCO View Post
Good post Doug. This looks like someone designed their own version of a very important piece using the wrong metal. If that happened I ask WHY do people do this? Larry
I'm going to take a close look in this area as I recently had to leave 3TP tied down thru some pretty heavy storms passing thru Killeen, Tx. Wind was strong enough to break my rudder gust lock and slam the rudder into the elevator. From the picture, how can you tell this is the wrong metal?
Terry
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  #4  
Old 08-15-2012, 03:04 PM
868RM 868RM is offline
 
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Location: lena, il.
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Default crack

Is there a crack in the mating part up about 1/4 in. and to the left?
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  #5  
Old 08-15-2012, 03:08 PM
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Location: 57AZ - NW Tucson area
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Quote:
Originally Posted by LARCO View Post
Good post Doug. This looks like someone designed their own version of a very important piece using the wrong metal. If that happened I ask WHY do people do this? Larry
I would look at it and say that the bend is a little too high and the back of the part - the radius of the bend - was resting on the sharp edge of the vertical stab spar...
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Gil Alexander
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Half completed RV-10 QB purchased
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  #6  
Old 08-15-2012, 03:24 PM
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AlexPeterson AlexPeterson is offline
 
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Location: Ottertail, MN
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Default

Quote:
Originally Posted by 868RM View Post
Is there a crack in the mating part up about 1/4 in. and to the left?
Good eye, sure looks like one.
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  #7  
Old 08-15-2012, 03:58 PM
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Bob Kuykendall Bob Kuykendall is offline
 
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Location: Vallecito, CA
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Default

Quote:
Originally Posted by LARCO View Post
Good post Doug. This looks like someone designed their own version of a very important piece using the wrong metal. If that happened I ask WHY do people do this? Larry
Here is a link to one other report of cracking in this part:

http://www.vansairforce.com/communit...ad.php?t=87124

Note that in that case the crack was through one of the bolt holes. Like the case discussed in this thread, the crack originated at the perimeter of the part at the apex of a concave angle.

So far as I know, in neither of the reported cases was there any indication that the part was other than as supplied by Vans.

Thanks, Bob K.
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  #8  
Old 08-15-2012, 04:16 PM
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Neal@F14 Neal@F14 is offline
 
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Default

Was all that paint chipped away as part of the inspection, or was it all chipped away already prior to being inspected? If the latter, then wouldn't that indicate some seriously abnormal vibration has been going on?
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Neal Howard
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  #9  
Old 08-15-2012, 04:17 PM
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Larco Larco is offline
 
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I made an incorrect statement earlier thinking of the 4/6/7/8 models sorry for assumption and wasted words. Larry
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  #10  
Old 08-15-2012, 04:44 PM
CRW CRW is offline
 
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Location: Rogersville, Tennessee (N.E. TN.)
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Default Crack in VS attach plate

Doug,
When did the airplane go into service and how many hours are on it now?
Thanks for the information.
Best regards,
Chuck
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