EMPLOYEE WAS WORKING ON THE ENGINE OF A TRACKMOBILE; THE DOOR OF THE OPERATORS COMPARTMENT WAS IN AN OPEN POSITION. HE GOT OFF THE TRACKMOBILE TO GET A PART AND AS HE STEPPED UP ON THE SIDE O F THE TRACKMOBILE, THE LEFT SIDE OF HIS HEAD CAME IN CONTACT WITH THE BOTTOM OUTSIDE CORNER OF THE DOOR, CAUSING INJURY THAT REQUIRED STITCHES.