Aviation Expert Captain Shakti Lumba spoke to India Today on Saturday to discuss the factors that led to Air India Express plane crash. He said: "The plane landed in rain, with tailwinds and gone off the runway. Wet runway, downward slopes and hence poor braking forms the recipe for landing accident on a restricted runway. "Tabletop runways are not in general unsafe. What is unsafe is the amount of safety margin on either end of the runway."