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Cockpit smoke

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MnwPeeps(at)AOL.COM
Guest

Posted: Wed Jan 09, 2008 8:01 am Post subject: Cockpit smoke

Periodic completed in early Dec. on my -6A, by an experienced GA  mech/pilot.

  

 Flew the a/c 30 minutes to home base in MA.

  

 Two weeks later, within 10 seconds of first (next) start-up, oily smoke  fills cockpit - had to quickly open tilt.

 Continued for about 45 sec. to a minute, then the smoke ceased and hi-pwr  turn-up was fine. Shut down.

  

 Waited about ten days ('til yesterday), fired it up again, same result. No  ramp drip. My mech is mystified.

 I, personally, have not had this occur in 50 years of flying a/c of all  type. 

  

 Mech is now in FL for two months. Anybody had similar, with an idea for the  owner?

  

                                                                                                      Thanks  -     George



Start the year off right.  Easy ways to stay in shape in the new year. 

  [quote][b]

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ronlee(at)pcisys.net
Guest

Posted: Wed Jan 09, 2008 9:19 am Post subject: Cockpit smoke

First thing I would do is remove the  cowling and investigate.  If you

 have not done this then DO NOT fly  until you identify and resolve

 the problem.

  

 Ron Lee

 [quote]   ---

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MnwPeeps(at)AOL.COM
Guest

Posted: Wed Jan 09, 2008 9:59 am Post subject: Cockpit smoke

In a message dated 1/9/2008 12:20:18 PM Eastern Standard Time,  ronlee(at)pcisys.net writes:

  	  Quote: 	
		     First thing I would do is remove the    cowling and investigate.  If you

   have not done this then DO NOT fly    until you identify and resolve

   the  problem.

	


 

 Yeah, thanks, Ron. My thoughts, too - - but it is rather cold up here, with  no hgr space. I'm sort of a candy-ass, as fingers begin to freeze.

  

 I was hesitant to go through the drill, and then, being inexperienced in  mechanical work, to not see anything identifiable. I'm thinking I'd like  something to suggest to my mech (surprised he has no ideas....he's a good mech,  best as I know). But I suppose I'll just have to get some locals experts to look  at it. 

  

 It's odd that it flew well from the NH "button-up" to here at my  MA base....but then began smoking. I guess one might have to suppose it  very possibly is not related to the so-called annual.    



Start the year off right.  Easy ways to stay in shape in the new year. 

  [quote][b]

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kbob(at)cox.net
Guest

Posted: Wed Jan 09, 2008 11:20 am Post subject: Cockpit smoke

Check the crankcase breather tube over the exhaust system.  It may be soaking the exhaust pipe with oil and burning off on start up.  At idle power on the ground you can get plenty of exhaust in the cabin.



Have somebody stand by when you start it again and see if they can detect any external smoke. If it repeats itself, shut down and go look for the smoke trail to find the culprit.



Kelly Patterson

RV-6A N716K

PHX, AZ



---- Ron Lee <ronlee(at)pcisys.net> wrote: 

[quote] First thing I would do is remove the cowling and investigate.  If you

 have not done this then DO NOT fly until you identify and resolve

 the problem.

 

 Ron Lee

   ---

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Ed Anderson

Joined: 10 Jan 2006
Posts: 475

Posted: Wed Jan 09, 2008 11:24 am Post subject: Cockpit smoke

I'm not a mechanics , however, it sounds to me like you   have an oil leak which slowly  accumulates a bunch over several  days, then when you fire it up, the oil creates the smoke until it is  depleted.  Could be a leak internal to the engine example intake or  exhaust valve (I would bet on intake) leaking into the induction tubes  and then being sucked into the pistons and burned.  

  

 Ed

  

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_________________
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

ronlee(at)pcisys.net
Guest

Posted: Wed Jan 09, 2008 11:57 am Post subject: Cockpit smoke

It may have taken that amount of time  for something to develop.  Find a hangar, remove the cowl

 and look for loose hoses, particularly  oil carrying hoses.  It may be something else but without

 looking, don't expect  answers.

  

 Ron Lee

 [quote]   It's odd that it flew well from the NH "button-up" to here at    my MA base....but then began smoking. I guess one might have to suppose    it very possibly is not related to the so-called annual.      

    

    

    

    

[b]

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MnwPeeps(at)aol.com
Guest

Posted: Wed Jan 09, 2008 11:59 am Post subject: Cockpit smoke

In a message dated 1/9/2008 2:25:42 PM Eastern Standard Time,  eanderson(at)carolina.rr.com writes:

  	  Quote: 	
		     it sounds to me like you  have an oil leak which    slowly  accumulates a bunch over several days, then when you fire    it up, the oil creates the smoke until it is depleted.  Could    be a leak internal to the engine example intake or exhaust valve (I would    bet on intake) leaking into the induction tubes and then being sucked    into the pistons and burned.  

    

	


 

 Thanks, Ed.  I certainly agree with the slow-accumulation theory.  I'll go out with another guy, fire it up, see what we see from an external  view. Shouldn't be a biggie.    



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Jerry Cochran

Joined: 10 Jan 2006
Posts: 111
Location: Wilsonville, OR

Posted: Thu Jan 10, 2008 11:11 am Post subject: Cockpit smoke

Ron Lee said it best, and let me second it...



DO NOT FLY THIS AIRCRAFT.  Until you get it sorted by yourself or 

someone who knows what they are doing.



My .02 of course...



Jerry

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