An eight-inch-long (0.2 m) crack was found in an external fuel-tank pylon of a U.S. Coast Guard HH-60 helicopter. The damaged pylon was removed from service and destructively examined at NASA Langley Research Center (LaRC) to determine the cause of the crack. Results of the analysis revealed that crack initiation occurred at corrosion pits in a fastener hole and crack propagation was a result of cyclic loading.


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    Title :

    Failure Analysis of a Helicopter External Fuel-Tank Pylon


    Contributors:

    Publication date :

    2002


    Size :

    16 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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