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Thread: Cherokee oil cooler hosed.

  1. #1
    S2D's Avatar
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    Cherokee oil cooler hosed.

    I'm a little ( ok, a lot) vague on Tso's
    Do the oil cooler hosed required by the AD have to be factory manufactured with a Tso' tag to meet the requirements of the AD, Or can in shop hoses be assembled.
    ( They require Tso C53a type C or D)

    Thanks.

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    www.SkupTech.com mike mcs repair's Avatar
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    AD link??

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    My take is it's all in the construction. If one has the proper tools to assemble the specified tso'd hose and fittings and assemble the firesleeve as per the AD, good to go. In my case I can assemble the hose and fittings but I don't have and don't intend to buy the tools to properly secure the firesleeve to the hose so I gotta buy premade.
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    The AD (AD2017-14-04) requires TSO-C53a type C (requires replacement intervals) or TSO-C53a type D (no replacement intervals) to be installed to comply. You have to have permission to manufacture and mark anything as TSO'd. It's the hose assembly here, not just the components.

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  5. #5
    S2D's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    AD link??
    try this

    http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/0/9a029fe3e00be63d8625815a0048cd54/$FILE/2017-14-04.pdf
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  6. #6
    wireweinie's Avatar
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    This is the sheet on this TSO. It specifically calls out 'hose assemblies'.

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    S2D's Avatar
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    The more I read that AD, the confuser I get. At one point it appears to say that all hoses have to be replaced with type C or D hoses but in the comments section it says other type hoses aren't affected by this AD.
    What am I missing.

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    www.SkupTech.com mike mcs repair's Avatar
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    Cherokee oil cooler hosed.

    Quote Originally Posted by N86250 View Post
    My take is it's all in the construction. If one has the proper tools to assemble the specified tso'd hose and fittings and assemble the firesleeve as per the AD, good to go. In my case I can assemble the hose and fittings but I don't have and don't intend to buy the tools to properly secure the firesleeve to the hose so I gotta buy premade.
    You use a tool for cv joint boots on a car. $10 at Napa. To put fire sleeve retainers on. If that’s the metal style? Pictures??


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  9. #9
    www.SkupTech.com mike mcs repair's Avatar
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    https://www.napaonline.com/en/p/SER30950


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  10. #10
    www.SkupTech.com mike mcs repair's Avatar
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    I’d make new hose myself if i have the right tools


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  11. #11
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    Quote Originally Posted by mike mcs repair View Post
    I’d make new hose myself if i have the right tools


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    I'd normally agree with that. But the AD specifically calls out TSO'd hose assemblies, which we can't fabricate in the field. So I'd have to recommend using TSO tagged hoses here.

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  12. #12
    wireweinie's Avatar
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    Quote Originally Posted by S2D View Post
    The more I read that AD, the confuser I get. At one point it appears to say that all hoses have to be replaced with type C or D hoses but in the comments section it says other type hoses aren't affected by this AD.
    What am I missing.

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    Forget about anything prior to page 6. It's just noise. The legal stuff starts on page 6 and goes on from there. You need to figure out if your cooler is mounted for or aft of the rear of the engine. Then follow the applicable instructions. Looks like for coolers aft of the rear of the engine, just inspections are required until hoses are replaced with the Type D hoses. If the cooler is mounted anywhere OTHER than aft, the inspections are required plus some routing and security instructions need to be followed.

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  13. #13
    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by wireweinie View Post
    I'd normally agree with that. But the AD specifically calls out TSO'd hose assemblies, which we can't fabricate in the field. So I'd have to recommend using TSO tagged hoses here.

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    no, it calls out a hose made TO that standard.... it's just about old hard rubber part of the hose... not asking to inspect the fittings for cracks or such... still would love someone to post a picture of the hose in question... I'm just assuming an Aeroquip with reusable ends, under a fire sleeve..???

  14. #14
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    I'm looking at a Cherokee with stratoflex 111-8 hose dated 2Q 13 and no firesleeve. Cooler is mounted in front.

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  15. #15
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    Curious if the AD being referenced requires fire-sleeved hoses?
    People seem to be getting carried away with fire-sleeving lately--
    not long ago, I saw a C180 that had fire-sleeved brake lines.
    Seemed like overkill to me.
    Click image for larger version. 

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  16. #16
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    Quote Originally Posted by hotrod180 View Post
    Curious if the AD being referenced requires fire-sleeved hoses


    That's why I'm trying to figure out if these hoses are legal
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  17. #17
    wireweinie's Avatar
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    The Type D hoses referenced are fire sleeved.

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  18. #18
    Charlie Longley's Avatar
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    Quote Originally Posted by hotrod180 View Post
    Curious if the AD being referenced requires fire-sleeved hoses?
    People seem to be getting carried away with fire-sleeving lately--
    not long ago, I saw a C180 that had fire-sleeved brake lines.
    Seemed like overkill to me.
    Click image for larger version. 

Name:	firesleeved brake lines.jpg 
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    That’s pretty hilarious!
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  19. #19
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    That's pretty bad when you need fire sleeve on the brake hoses. That's what I call "landing hot"....
    After Monday and Tuesday, even the calendar says WTF !
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  20. #20
    hotrod180's Avatar
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    Are fire-sleeved lines actually required for oil and fuel in the engine compartment?
    My C150/150TD had fire-sleeved fuel lines,
    but my other 3 planes (including the current one) did not.
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  21. #21
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    Some STC's require fire sleeve on lines. Most of the fuel flow indicators require fire sleeve over the fuel lines in the section that the flow transducer is installed. Except for turbine engine installations I've seen very few manufacturer's requirements for sleeving.

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