The widow of a pilot killed in a helicopter crash on Molokai in 2011 is suing the aircraft's manufacturer, saying defective design caused the crash that killed all five people aboard.  Violeta Escobar filed a lawsuit in federal court in Hawaii against manufacturer European Aeronautic Defense and Space Co. and the owner of the helicopter. Escobar's husband, Nathan Cline, was the pilot for Blue Hawaiian Helicopter who died in the crash. The crash also killed four tourists. Escobar claims in the lawsuit that the companies should have known of manufacturing defects that could cause the helicopter's structure and components to fail without warning.