THE EE WAS ATTEMPTING TO UNFASTEN A NUT FROM A TURNBUCKLE ATTACHED TO A MOTOR REDUCER ON CONVEYOR BELT BC-04 WHEN THE ACCIDENT OCCURRED. THE EE WAS HOLDING THE HAND RAILINGS ON EITHER SIDE OF THE CONVEYOR BELT WITH BOTH HANDS. HE EXERTED PRESSURE ON A WRENCH WRAPPED AROUND A NUT WITH HIS LEFT FOOT. AS EE PUT HIS FULL WT. ON THE WRENCH CAUSING HIS BODY TO RISE OFF THE WALKWAY, THE