The National Transportation Safety Board released its preliminary findings after a 43-day investigation into the aviation incident that killed NASCAR veteran Greg Biffle, his immediate family, two pilots and one other associated individual at Statesville Regional Airport in North Carolina.<br>A full report will still take 12 to 18 additional months to complete. NTSB preliminary reports do not ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/ntsb-release-preliminary-report-on-fatal-greg-biffle-aviation-incident-/10794220/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=www'>Keep reading</a>