DURING A BIT CHANGE, ONE OF THE TWO LIFT EYES ON THE DECK BUSHING LET LOOSE. THE 1"" ROUND STOCK LIFT EYE WAS CONNECTED TO THE SANDLINE VIA A SPREADER CABLE. WHEN THE LIFT EYE LET LOOSE, IT PEN ETRATED A DRILL OPERATOR CAB WINDOW AND GLANCED OFF THE DRILL OPERATOR'S HARD HAT. THE OPERATOR RECEIVED MEDICAL TREATMENT FOR A GLASS IN HIS EYE AND WAS EXCUSED FROM WORK. WEARING SAFETY GLA