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Rotax 582 failure (semi off-topic)

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Thu May 17, 2007 12:19 pm Post subject: Rotax 582 failure (semi off-topic)

Gentlemen, this is not Kitfox business but since many of us fly behind 

a 582, I wonder if you could have a look at this.

My friend flying an Avid Flyer lost his 582 in flight, as I said 

earlier. His engine is old, from 1990, it has a total of 340 hours but 

it has been serviced in 2002, including new crankshaft bearing, when 

the engine had 280 hours.

Inspection of the engine by a Rotax mechanic shows that the aft 

cylinder conrod roller bearing was completely destroyed. The conrod was 

loosen from the crankshaft and the sump showed several cracks. The 

forward cylinder and conrod showed no damage and everything else was 

moving and well oiled. Here is a photo of the opened engine. Has anyone 

an idea of what could have gone wrong because the Norwegian mechanic 

has not a clue. Thanks in advance.



Cheers,

Michel Verheughe

Norway

Kitfox 3 - Jabiru 2200



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Bob

Joined: 24 Oct 2006
Posts: 89
Location: Damascus, Maryland, USA

Posted: Sat May 19, 2007 1:52 am Post subject: Re: Rotax 582 failure (semi off-topic)

Michel -

The "classic" signs for typical bearing failures are pretty easy to find through a Google search, but it's easy to get mis-led, kind of like trying to use the web to diagnose a medical condition. I've looked at many failed bearings and it takes personally looking at it closely under magnification.  You might see if you have degreed mechanical or metallurgical engineers in your area to ask.

Bob

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occom

Joined: 26 Aug 2006
Posts: 404

Posted: Sat May 19, 2007 2:31 am Post subject: Rotax 582 failure (semi off-topic)

It's hard to tell from the photo. It looks like there is a small spot of 

rust on the crankshaft web in that cylinder. (Seen just above the arrow) If 

that cylinder was open for an extended period of non running and had not 

been properly sealed and lubed for storage it's likely that moisture also 

got to the bearings. They just will not last with rust pitting.

It's too bad the fellow had not had the crank replaced when the engine was 

service close to the overhaul point of 300 hours.



Dave Goddard- Mod IV 1050/582

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Sun May 20, 2007 10:34 am Post subject: Rotax 582 failure (semi off-topic)

thank you Bob and Dave for your answers. I have forwarded them to the 

owner of the engine.



Cheers,

Michel Verheughe

Norway

Kitfox3 - Jabiru 2200

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gofalke(at)sbcglobal.net
Guest

Posted: Sun May 20, 2007 6:17 pm Post subject: Rotax 582 failure (semi off-topic)

[quote][b]

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Tue May 22, 2007 10:16 pm Post subject: Rotax 582 failure (semi off-topic)

If somebody is interested, here are the close views of the 582 that 

went amok.

http://rolf.nossum.net/582.broken.rod/



Cheers,

Michel Verheughe

Norway

Kitfox 3 - Jabiru 2200



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akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Wed May 23, 2007 6:23 am Post subject: Re: Rotax 582 failure (semi off-topic)

I have seen this quite a bit on snowmachines.. in fact had one almost identical two years ago on my AC 600.  From the enlarged pics it looks like the piston siezed first and it twisted off the conrod.  I have lost conrod bearings before and it will get to slapping and knocking, but that twisted conrod leads me to beleive the piston was the culprit.  See if you can find out if the scuffing on the piston was on the intake or exhaust side.

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Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....

Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Wed May 30, 2007 1:18 pm Post subject: Rotax 582 failure (semi off-topic)

On May 23, 2007, at 4:23 PM, akflyer wrote:

 	  Quote: 	
		   I have seen this quite a bit on snowmachines.


	


Sorry for the delay, I was taken by other matters. Thank you Leonard, I 

will forward this to the owner.



Cheers,

Michel Verheughe

Norway

Kitfox 3 Jabiru 2200



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