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Re: Report of a Q-200 crash today

Frankenbird Vern
 

 Investigation on heat treat of starter gears is in order. It is not difficult to Embrittle (thin glass) when heat treating, Mike. Also the heat treat is not done correctly then you have an Annealed gear (peanut butter).  You were fortunate to land off-field away from other folks,,the next fail might NOT be as fortunate. 

  I hope this is not yet another case of Chinese Mystery Metal arriving in the fleet...again!   😒

 My 150B had the same kind of starter on the O-200.  It reminded me of antique tractors but worked well for the decades I owned the Cessna.

Vern  
The Village Idiot werkin in OKC at the LazyB again.    

From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Bruce Crain <jcrain2@...>
Sent: Friday, April 8, 2022 11:05 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] Report of a Q-200 crash today
 
B and C in Newton, KS makes a light weight starter that eliminates the old Sprag Clutch.  It turns over a lot faster than the old starter.  You will need to modify the firewall cut out a small bit but the starter is a solid player!
Bruce Crain


On Apr 8, 2022, at 3:54 PM, Jay Scheevel <jay@...> wrote:



Thanks for the update, Mike. This is all good stuff to know. Again, sorry about your airplane, but glad you are doing well, and willing to share the results of what you find.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Mike Dwyer
Sent: Friday, April 8, 2022 2:02 PM
To: main@q-list.groups.io
Subject: Re: [Q-List] Report of a Q-200 crash today

 

So an update on my engine failure.  

I got a bit further into the engine tear down and when I pulled the starter, there was the smoking gun.  The starter motor turns a large gear that goes through a sprag clutch into a small gear that drives the crankshaft.  I have a pull starter on mine so this whole mess disengages from the crankshaft gear when you release the pull handle.  My small gear had disintegrated.  I only found about half of it.  The rest is rattling around in the accessory case somewhere, which happens to be located where the oil pump is driven.  Or possibly a piece of hardened steel got into the oil pump and damaged it.  More to follow, but it looks like the root cause was a starter gear failure.  The part was the almost new Niagara Airparts upgraded Sprag Clutch and it had about 100 hours on it!   On the day of the accident, the plane started perfectly.

Mike Dwyer xQ200

 

Q200 Website: http://goo.gl/V8IrJF

 

 

On Sun, Mar 20, 2022 at 6:39 AM Adam hied <hiedadam@...> wrote:

Hey mike,

Glad you’re okay. I was really sad about the accident. Was really hoping to get in touch with you and do some formation once I finish the install of the new engine in the dragonfly since I’m over on the east coast and my family lives near brooksville.

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