Arrow Air Flight 1285 (1985)
This crash in 1985 led engineers to seriously change maintenance practices to make sure this sort of crash never happens again. As one of Canada’s deadliest crashes, all 256 people died. The main cause was ice on the wings and miscalculated weight. Before crashing and exploding, the plane lifted into the air and then crashed. This system failure caused aviation engineers to rethink ice, speed with takeoff, and how the engines operate (Simple Flying).