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  #1  
Old 04-14-2016, 11:12 AM
yankee-flyer yankee-flyer is offline
 
Join Date: Jun 2009
Location: Dayton, OH
Posts: 838
Angry Prop blade failure! RV-12

Had my excitement for the week. Shot a couple of touch & goes at Greene County (I19) and was heading over to Richmond. About 3 west of I19 started a VERY severe vibtatiion-- only slightly less at lower power settings. First thought I'd lost part of a prop blade and then that I'd had a motor mount fail. Scared me! Nursed her back for a straight-in to 07 and when I got to the hangar I found a big bulge-- 6" long and max 3/16 to 1/2 inch deep-- on both side of one blade just inboard of the tip stripes. New blade, less than 40 hours time.

Will post photos later

Wayne 120241/143WM

Last edited by rv6rick : 04-14-2016 at 03:31 PM. Reason: Removed expletive
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  #2  
Old 04-14-2016, 11:22 AM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
 
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 16,114
Default

Do you know when the prop was purchased??

Somewhere back in the dusty corners of my brain seems to be remembrances of this happening before.........not sure if it was on the 12 or not.
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #3  
Old 04-14-2016, 11:34 AM
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Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Default here you go..

http://www.vansairforce.com/communit...d.php?t=124185

http://www.vansairforce.com/communit...d.php?t=124498
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."

Last edited by Mike S : 04-14-2016 at 12:48 PM.
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  #4  
Old 04-14-2016, 01:11 PM
yankee-flyer yankee-flyer is offline
 
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Location: Dayton, OH
Posts: 838
Default Prop was purchased

December 2015 and had about 25 hours on it. Always in a heated hangar, too. Wayne
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  #5  
Old 04-14-2016, 02:43 PM
Mike S's Avatar
Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Default

If the prop is that new, I would expect it to be under some kind of warranty.

Time for a phone call or two.
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #6  
Old 04-14-2016, 03:55 PM
rightrudder rightrudder is offline
 
Join Date: Mar 2014
Location: Laguna Hills, CA
Posts: 1,853
Default

Scary! Glad you got 'er back on the ground safely.
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RV-9A "slider"--sold in July 2021
Flew to Osh in 2017, 2018 & 2019!
Donation made for 2021
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  #7  
Old 04-14-2016, 09:17 PM
yankee-flyer yankee-flyer is offline
 
Join Date: Jun 2009
Location: Dayton, OH
Posts: 838
Default After Seeing Photos

Sensenich says this is what they thing happened. There's a "plug" at the hub end of our hollow blades. They think it came loose and was thrown outboard inside the hollow blade causing it to "bulge". So one blade was not only about a half-inch thicker just inboard of the tip, but it was also statically and dynamically unbalanced. They are sending new blades! I'll pull the cowl and check engine mounts, etc, VERY carefully.





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  #8  
Old 04-15-2016, 08:26 AM
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KatieB KatieB is offline
 
Join Date: Jun 2010
Location: Belton, MO
Posts: 1,145
Default

If the engine vibration was severe enough to make you want to check the engine mounts, do you also need to inspect the crankshaft and gearbox?
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Katie Bosman
EAA Homebuilt Aircraft Council
Rebuilt most of SNF tornado victim RV-3B Tony Boy II (had to sell him, but he's flying!)
VAF Dues Paid 2021!
Thoughts & opinions expressed here are my own, and not those of my employer.

Last edited by KatieB : 04-15-2016 at 08:26 AM. Reason: english
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  #9  
Old 04-15-2016, 09:05 AM
Harvey rv12 Harvey rv12 is offline
 
Join Date: Apr 2015
Location: Olympia WA
Posts: 198
Default

I am anxious to see a response from Sensenich. Will this turn into a recall?. How do you inspect for a loose internal plug ?.
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Tom O.
RV-12, bought flying
Hoskins Field, 44T
Olympia WA

the bitterness of poor quality
lingers long after the cheap
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  #10  
Old 04-15-2016, 09:33 AM
yankee-flyer yankee-flyer is offline
 
Join Date: Jun 2009
Location: Dayton, OH
Posts: 838
Default Acording to Sensenich

They've seen this once before in 500,000 props. I did request, and am supposed to be getting, two new blades since both were from the same batch and I have zero confidence in the second one.

Wayne
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