A Case Study of Nose Landing Gear Failure Caused by Fatigue

  • V. Y. Guertsman
Conference paper


The nose landing gear of a commercial turboprop airplane failed during landing. A post-occurrence examination found a fracture in the trunnion arm of the oleo strut housing. The landing gear had been installed on the aircraft after an overhaul. The laboratory investigation has established that the eventual ductile overload fracture was precipitated by a pre-existing fatigue crack. The fatigue fracture surface had two distinct zones different in macroscopic and microscopic appearances as well as chemical composition. Analysis of the results has shown that the older region of the fatigue crack pre-dated the overhaul, while the fresher fatigue zone grew during the post-overhaul operation of the aircraft.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Metals Handbook,Fractography, 9th edn., vol. 12, p.426. ASM International, Metals Park (1987)Google Scholar
  2. 2.
    Sachs, N.W.: J. Failure Analysis and Prevention 5(2), 11 (2005)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • V. Y. Guertsman
    • 1
  1. 1.Engineering LaboratoryTransportation Safety BoardOttawaCanada

Personalised recommendations