Why did Roberto Clemente's Plane crash?

The plane was dangerously overloaded. Unfortunately there was engine failure. It could be heard as it went down the runway. Clemente ignored them.  It was shortly after takeoff that the plane went down. Roberto Clemente was a pioneer. He was a legend. This painting by Verrici reminds people how great Roberto Clemente truly was. This is a great fathers day gift, and Christmas gift.