EE AND COWRKER WERE WORKING ON THE D50K DRILLINSTALLING THE MAST RAISE CYLINDERS. EE HAD WELDED TWO PIN BOSSES IN PLACE FOR THE LET LOWER CYLINDER PINHOLE. WHEN THEY TRIED TO INSTALL THE CYLIN DER THEY REALIZED THAT ONE OF THE WELDED BOSSES WAS NOT IN ALIGNMENT. EE STARTED TO CUT IT OFF THE A TORCH TO REPOSITION THE BOSS. WHILE EE WAS CUTTING, THE TORCH CAME ACROSS SOME GREASE, WHI