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912 ULS Oil Leak

in 912 / 914 Technical Questions 9 years ago

  • Re: 912 ULS Oil Leak

    by » 9 years ago

    I was told that Permatex is the more watered down, household brand and Loctite is the commercial use version.
      
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  • Re: 912 ULS Oil Leak

    by » 9 years ago

    I have removed the cylinder and can see no sign of a crack using a Snap-On Borescope, thinking of using a dye penetrant while waiting for the Rotax seals and Loctite 598 to be delivered.
    Thanks for all the help.
    Ron
      
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  • Re: 912 ULS Oil Leak

    by » 9 years ago

    Hi Ron,

    Could you just have a bad seal?
    The dye penetrant is an excellent idea since you have things apart.
    It may boil down to just using some Loctite 598 on the stud or re-sealing.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: 912 ULS Oil Leak

    by » 9 years ago

    remember; the studs on #3 cylinder don't have seals or o-rings on pre-2006 crankcases.
    Always try to use fluorescent penetrant for NDI. dye penetrant is discouraged for use in aviation as it can hide cracks in further testing.
    yaa, yaa, I know, the photo I posed was dye penetrant. (but that crankcase was scrap and dye is better for photos)
      
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  • Re: 912 ULS Oil Leak

    by » 9 years ago

    Had another A&P/IA look with the bore scope and found no sign of a crack, did see what may be a small area of porosity on the backside of the area where the stud screws in to the case.

    Plan to proceed with the Loctite 598 repair as soon as the O-rings and parts from Lockwood arrive.

    Thanks all, hopefully all will be well.

    Ron
      
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