The deadliest accident at Toronto Pearson International Airport took place on July 5, 1970, when Air Canada Flight 621, a Douglas DC-8 registered CF-TIW, was flying on a Montreal-Toronto-Los Angeles route.
Historical
Links: en.wikipedia.org
By: kjfitz
http://www.theglobeandmail.com/news/national/horrific-air-canada-crash-gets-permanent-memorial-site-after-43-years/article13007464/