The NASB concluded: "The original design together with the continuous airworthiness measures and the associated inspection system did not guarantee the minimum required level of safety of the Boeing 747 at the time of the accident." As a result of this accident, and other occurrences of wing-pylon problems on the B-747, "Boeing developed a stainless steel fuse pin with a considerably improved fatigue and crack growth life," the report said. "Furthermore, the static strength and fatigue, and crack growth analysis, will be supported by tests.