The paper analyses the causes of the incident of an F-4 which landed abnormally due to a crack in the nose landing gear hydraulic actuator cylinder. Striations, typical of a fatigue crack, were observed on the fracture surface and a large quantity of corrosive oxide was detected in the initial stage of the crack. Furthermore, surface pits caused by corrosion were found inside the cylinder. A surface flaw of this kind was connected to the fracture surface as a microscopic crack. By analyzing the fractography and metallography of the failed parts, it is found that the cylinder pitted as a result of chemical reaction with internal fluids, the pitting became a microscopic crack and caused failure.


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    Titel :

    Failure analysis of nose landing gear assembly


    Weitere Titelangaben:

    Schadensanalyse eines Bug-Flugzeugfahrwerkes


    Beteiligte:
    Lee, H.C. (Autor:in) / Hwang, Y.H. (Autor:in) / Kim, T.G. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2003


    Format / Umfang :

    8 Seiten, 13 Bilder, 2 Tabellen, 3 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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