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Small cracks caused landing gear on JAS MD-81 to break in 2004 accident
29 July 2006

Small cracks that were overlooked by mechanics during inspections caused the main landing gear of a Japan Air System (JAS) MD-81 to break when it landed at Tokunoshima Airport (TKN) on January 1, 2004, according to the investigation report released by the ARAIC. Three cracks were found, believed to be the starting points of the break. Inspectors suspect that the cracks, measuring between 3 and 5.2 millimeters long, developed as a result of metal fatigue. The committee concluded that cracks probably developed as a result of stresses generated during a gear walk (serious fore and aft oscillations of the gear) before restrictor plates were installed. (Mainichi)