Also UA973 out of BRU to ORD was cancelled today. After the plane left with a 70 minutes delay it suffered a bird or rabbit strike while it took off. After the plane had climed to a safe altitude the engine was shut down and the plane (Boeing 767-300ER) dumped fuel over the North Sea before returning back to BRU for landing. After landing dented fan blades were discovered which suggested that the plane came in contact with a hard object, most likely a bird or a rabbit.