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912 ULS 19 hours oil leak at compression connector

in 912 / 914 Technical Questions 8 years ago
Shouldn't this connection and others like be it be somehow irreversible?

Pressure dropped to 1.5 on crosswind. Brought plane down to find this connection was so loose it could be turned with fingers.

Design defect?
20160622_194542.jpg (You do not have access to download this file.)
20160622_194553.jpg (You do not have access to download this file.)

  • Re: 912 ULS 19 hours oil leak at compression connector

    by » 8 years ago

    Not a poor design. Poor installation and or inspection. If these are tightened properly they will not come loose.

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

      
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  • Re: 912 ULS 19 hours oil leak at compression connector

    by » 8 years ago

    Thanks for the response Roger, with all due respect, if there is no mechanical advantage over this connector loosening other than if its tight it doesn't come off, this is s design flaw. This is fine on a skimobile, but not on an aircraft.
      
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  • Re: 912 ULS 19 hours oil leak at compression connector

    by » 8 years ago

    I deal with lots of these. Never had one come loose. I work as a tech on a couple different fleets and have never had one come loose. I have seen a couple that were not torqued properly that oozed, but applying the proper torque stops that. These are very common and owners don't have issues unless it was not torqued properly from the start.

    Like I tell everyone. It may be hand tight, but wrench loose. All these fittings on the entire engine should have had a wrench put on them at the 25 hr. Inspection.
    Just like I hear old timers tell me you must have safety wire or something on the oil filter or it will come off. It never will if installed properly.

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

      
    Report
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