OUR EMPLOYEE HAD LOCKED & TAGGED THE MILLING FAN TO INDICATE HE WAS WORKING ON IT. HE WAS TO HARD SURFACE THE INSIDE OF THE FAN. HE WAS OUT OF SIGHT OF TWO EAGLE MINE EMPLOYEES ON OTHER SIDE OF THE FAN. THEY TURNED A SHEAVE TO REMOVE DRIVE SHAFT BELTS WHICH TURNED A FAN BLADE & SMASHED HIS HAND, BREAKING A BONE & BRUISING THE HAND BADLY.