Peeling the Onion

Discussion in 'Maintenance Bay' started by MBDiagMan, Apr 13, 2019.

  1. SkyDog58

    SkyDog58 Ejection Handle Pulled PoA Supporter

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    Old dog w/o new tricks
    I have never seen any independent shop or individual mechanic follow a system as robust as even the most modest Part 145 does. And if you say that you do, I’d say you’re disingenuous at best.
     
  2. OneCharlieTango

    OneCharlieTango Pre-Flight

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    Having overhauled an IO-520 several years ago, here's one bit of advice I'd give that doesn't seem common. I'd get it overhauled as close to home as you can find someone to trust. Then you can go look at it occasionally and, more importantly, make them look at you.
     
  3. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    And when you go that way, you pay for a lot you usually don't need, and you loose control of the parts buying, Plus you will not get your good parts back, you normally just get an engine off the shelf.

    Plus the fact that you most likely don't realize, they send their machine work out to the same machine shops as all the others rebuilders do. They buy the same parts from the same manufacturers that any other shops do
     
  4. JAWS

    JAWS Line Up and Wait

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  5. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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  6. JAWS

    JAWS Line Up and Wait

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    No shouting here. Don't need to when you follow the manual. o_O
     
  7. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    There ya go folks, The cop out, doesn't know the reason, So
     
  8. JAWS

    JAWS Line Up and Wait

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    No cop out, just a differing opinion about how an overhaul can be done. The OP wanted some feedback. Some overhaulers do the bare minimum, some do more. Some follow manuals and service bulletins, some do not.

    For the OP, these are things to ask before you start, so you can make an educated decision that you can live with.
     
    Last edited: Apr 14, 2019
  9. Cap'n Jack

    Cap'n Jack Final Approach

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    Is there a reason to not follow the manufacturer's guidance?
     
  10. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    Yes, the manufacturer must apply their manuals to the worst overhauler in the industry.
    they must cover all circumstances that could occur.
    TCM engines have been overhauled in the field for many many years (1930-20++
    TCM knows there are those that will not have their cases reworked And TCM knows that those cases may not seal up as they should.
    in todays world of lapping and line boring cases provides us with cases that have perfect bearing clearances and perfectly fitting cases that do not require the silk thread to make up for deviances in the case.
    very light application of any of the approved sealing compounds insure that there will be no seepage and that is all we need.
     
  11. Cap'n Jack

    Cap'n Jack Final Approach

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    First they haven’t been “TCM” in close to a decade, now.

    Second, CM allows for the sealant as described above. Reference in the other thread on this subject.

    So why not follow the manufacturer guidance? You didn’t answer that question.
     
    Last edited: Apr 15, 2019 at 9:17 AM
  12. OneCharlieTango

    OneCharlieTango Pre-Flight

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    Why is this thread so acrimonious?
     
  13. Doc Holliday

    Doc Holliday Pre-takeoff checklist

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    Haven't been around long huh? ;)
     
  14. Cap'n Jack

    Cap'n Jack Final Approach

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    One of the participants likes to "post beyond their knowledge". For example, claims ammonia to be an acid and claims water isn't a solvent.
     
  15. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    And you like to argue about it, bring up old issues to de-rail the thread.
     
  16. Cap'n Jack

    Cap'n Jack Final Approach

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    I merely answered a question. I didn't say who.
    To bring it back on track, why not follow the manufacturer's guidance? CM allows the use of a silk thread or a thin layer of the appropriate sealant (stated in their instructions).
     
  17. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    Already answered that.
     
  18. MBDiagMan

    MBDiagMan En-Route

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    Just curious. Is all this angst toward Tom an effort to kill a sale for him? I have yet to see anything that indicates
    that his work is inadequate. If you have some evidence of that put it forth or kindly go to another thread with the Tom attacks.

    I started a thread seeking information and advice regarding the ills of my O-200A. Tom has put forth useful information as have a few others. I am not understanding how the angst toward Tom is productive in helping come up with a solution to my run out engine problem.

    Thanks
     
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  19. Cap'n Jack

    Cap'n Jack Final Approach

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    Where?
     
  20. bnt83

    bnt83 Final Approach PoA Supporter

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    Lotta folks in this thread haven’t assembled one. I’ve assembled 3. If you look up N7281X you might find the last one I did, the damn plane was totaled when another airplane was towed into it. Probably under 500 hours on that engine with 4 brand new cylinders. Just happens it was an O200. This ain’t rocket science.

    Now the fun, I took that thing apart about 100 hours after test flight cause it looked like there was too much metal in the filter for my inexperienced eye and I looked at every damn thing possible and there wasn’t a thing wrong. Threw it back together with all the original parts, ran great and obviously outlived the airplane. Who knows where it is now
     
  21. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    That ain't going to happen, my customers are smarter than that.
     
  22. JAWS

    JAWS Line Up and Wait

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    To the original poster.

    Take advice on the net with a grain of salt. Do your own research and ask lots of questions. Such as, what service bulletins are incorporated during the overhaul process? Are the manufactuers' manuals followed and referenced? What kind of warranty will I get? What is all included in the overhaul price? Do you have references that I can contact?

    I know I would be asking these. But, it isn"t my $$ either. :)
     
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  23. 3393RP

    3393RP Pattern Altitude

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    Looks like Tom answered the question well before the above quoted posts.

    :rolleyes:
     
  24. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    That statement alone shows us you do not have the basic understanding of FAR 43.2
     
  25. Cap'n Jack

    Cap'n Jack Final Approach

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    Actually, the question was "Why not follow the manufacturer's guidance?"
     
  26. JAWS

    JAWS Line Up and Wait

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    Please do educate us all. Start another thread about it. :)