Thanks Thanks:  0
Results 1 to 22 of 22

Thread: Trouble behind the gearbox

  1. #1
    Splatterpuss's Avatar
    Join Date
    Oct 2011
    Posts
    27
    Post Thanks / Like

    Trouble behind the gearbox

    These are pictures of a 182TW. The owner says the cracks have been present for decades and are no problem, but they look like trouble to me. Can the experts here weigh in?

    Thank you,

    Splat
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	cracks.jpg 
Views:	231 
Size:	450.2 KB 
ID:	15564   Click image for larger version. 

Name:	cracks 2.jpg 
Views:	283 
Size:	590.7 KB 
ID:	15565  

  2. #2
    Cub junkie's Avatar
    Join Date
    Mar 2002
    Location
    My Moms basement
    Posts
    2,116
    Post Thanks / Like
    An I/A has been letting that go for years?

  3. #3
    Splatterpuss's Avatar
    Join Date
    Oct 2011
    Posts
    27
    Post Thanks / Like
    Looking at the books, it seems so, yes.

  4. #4
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    11,364
    Post Thanks / Like
    never mind... I thought you meant original 182 trike .....you best look at the outer shoes for cracks too!! they (182 original) ARE $4700.00 EACH!!!!! I was shocked when I heard that last week!!

    ya cracks = bad... will need to add a doubler and probably a stringer(look at a 185 for example of what to do)... not earth shattering but some work....

  5. #5
    irishfield's Avatar
    Join Date
    Feb 2003
    Location
    Penetanguishene, Ontario Canada
    Posts
    2,987
    Post Thanks / Like
    Is the aluminum actually cracked or just the **** paintjob... looking at the belly someone forgot to clean and prep!

  6. #6
    Splatterpuss's Avatar
    Join Date
    Oct 2011
    Posts
    27
    Post Thanks / Like
    It's hard to tell, but the aluminum is definitely creased.

  7. #7
    Aviator's Avatar
    Join Date
    Jun 2002
    Location
    Canada (Legally)
    Posts
    1,398
    Post Thanks / Like
    Wrinkles down are usually telltale signs of hard landings (don't ask me how I know). I'd inspect the gearbox real carefully and if OK not worry about the creases - if that's what they are.

  8. #8
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    10,490
    Post Thanks / Like
    I have seen paint cracks like that on Cessnas and after inspecting found that it was only the paint. I agree that it does look like an aluminum crack. Clean it chemically and look inside. Slide your finger nail across it to see if it catches. If there is no crack, forget about it. It likely will not change for years.
    N1PA

  9. #9

    Join Date
    Jan 2012
    Posts
    1,789
    Post Thanks / Like
    If you trust an internet forum more than your mechanic I'd say you need to find a new mechanic.

    If that area has been seeing paint failure for decades it's way past time to touch up the paint.

  10. #10
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    11,364
    Post Thanks / Like
    I have seen one 170 with cracks there in those wrinkles.......... they just added a doubler

  11. #11

    Join Date
    Sep 2006
    Location
    corvallis,or
    Posts
    422
    Post Thanks / Like
    Asking questions on an aviation forum is using all available information. There are experts on here I would trust over any local mechanics, IA's or even the factory.

    If you spend enough time here, its easy to pick out the people you want to take advice from and the naysayers on this sight.

  12. #12
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    11,364
    Post Thanks / Like
    and when you go to make the doubler, use a larger piece of aluminum and roll it to shape BEFORE cutting it to size since you need the same amount extra metal on sides to engage your rollers..

  13. #13
    aktango58's Avatar
    Join Date
    Aug 2004
    Location
    18AA
    Posts
    9,301
    Post Thanks / Like
    Are those draw (cherry) rivets just to the left of the cracks, under the strut?

    Worth spending a little more time checking...
    I don't know where you've been me lad, but I see you won first Prize!

  14. #14
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    11,364
    Post Thanks / Like
    Quote Originally Posted by aktango58 View Post
    Are those draw (cherry) rivets just to the left of the cracks, under the strut?

    Worth spending a little more time checking...
    no, screws. Hmmmmmmmm

  15. #15
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    10,490
    Post Thanks / Like
    Quote Originally Posted by mike mcs repair View Post
    no, screws. Hmmmmmmmm
    Yup! Hmmmmmmmmmmmmmmm. I didn't notice those before. Good catch, that opens up another whole point of inspection and inquiry.
    N1PA

  16. #16
    gbflyer's Avatar
    Join Date
    Feb 2007
    Location
    PAGS
    Posts
    740
    Post Thanks / Like
    Seems reasonable that a crack in the aluminum would have kept going. Definitely investigate the possibility that its paint. Can't remember ever seeing screws there either, maybe something to do with the conversion? I do know that gearbox issues can get $$$$$ quick. We wholesaled a decent old 180 one time because of it. I think it turned out OK for the guy, but you never know until you open it up.

  17. #17
    aktango58's Avatar
    Join Date
    Aug 2004
    Location
    18AA
    Posts
    9,301
    Post Thanks / Like
    I had not expanded the picture. Screws just don't seem right.
    I don't know where you've been me lad, but I see you won first Prize!

  18. #18

    Join Date
    Jul 2010
    Location
    Elizabeth, WV
    Posts
    583
    Post Thanks / Like
    Quote Originally Posted by aktango58 View Post
    Are those draw (cherry) rivets just to the left of the cracks, under the strut?

    Worth spending a little more time checking...
    I took them to be machine screws with washers and stop nuts on the inside. jrh

  19. #19
    Steve's Aircraft (Brian)'s Avatar
    Join Date
    Aug 2004
    Location
    White City, Oregon
    Posts
    921
    Post Thanks / Like
    Blew up the picture and those are structural machine screws... They have the flanged head that makes it look like a washer is built into them.... I would remove one and check that the shoulder is the right length... Otherwise, they are perfectly legit to install there.

    Brian.
    Last edited by Steve's Aircraft (Brian); 04-22-2014 at 03:38 PM. Reason: spelling

  20. #20
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    10,490
    Post Thanks / Like
    Quote Originally Posted by Steve's Aircraft (Brian) View Post
    Blew up the picture and those are structural machine screws... The have the flanged head that makes it look like a washer is built into them.... I would remove one and check that the shoulder is the right length... Otherwise, they are perfectly legit to install there.

    Brian.
    You're right, perfectly legit. But why are they there in the first place? Cessna didn't put them there. It's the "why?", that has my attention.
    N1PA

  21. #21
    Steve's Aircraft (Brian)'s Avatar
    Join Date
    Aug 2004
    Location
    White City, Oregon
    Posts
    921
    Post Thanks / Like
    Quote Originally Posted by skywagon8a View Post
    You're right, perfectly legit. But why are they there in the first place? Cessna didn't put them there. It's the "why?", that has my attention.
    From the very first post this is a 182 converted to a tail wheel... The screws were used probably because it is difficult to get a bucking bar in there to drive a rivet... I have installed more than one structural screw because of that reason.

    As for the wrinkles and cracks... As Mike says, install a doubler plate there... I have seen that same thing on 170's with 180 gear legs and a doubler plate is a good solution. Go look at a 185 and copy the shape of the factory plate and install...

    Brian..

  22. #22
    Splatterpuss's Avatar
    Join Date
    Oct 2011
    Posts
    27
    Post Thanks / Like
    Thank all of you for your replies. I walked away from this airplane because there were just too many questions about the airframe. No mechanic can know everything or be everywhere. The expertise on this site is astounding. I always learn when I visit the site, and I'm grateful for the help.

    Splat

Similar Threads

  1. T for Trouble
    By sierra bravo in forum Cafe Supercub
    Replies: 17
    Last Post: 01-26-2013, 11:04 AM
  2. generator trouble
    By wacodriver in forum Everything Else (formerly:My Other Plane Is A....)
    Replies: 12
    Last Post: 03-21-2009, 08:13 PM
  3. Trouble getting an order
    By ddh in forum Member to Member
    Replies: 3
    Last Post: 02-14-2007, 12:07 AM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •