EE WAS USING A BOTTLE JACK AND A PIECE OF PIPE TO RAISE THE ENGINE ON A LOADER. HE RAISED THE FRONT OF THE ENGINE AND INSTALLED A 1"" PLATE TO MAKE ROOM TO REMOVE THE OIL PAN. THE EMPLOYEE LOWE RED THE JACK AND REMOVED THE JACK AND PIPE. THE PIPE SLIPPED OUT OF HIS HAND AND FELL ON HIS ARM CAUSING A LACERATION TO THE LEFT ARM.