An employee had rigged slings and shackles to a 419-pound fan silencer and communicated to the crane operator via radio to cable up. A coworker was helping stabilize the silencer because it was upside down in the shipping crate. While trying to stabilize it, an employee's fingers were caught between the silencer leg and the ground. His left index fingertip was crushed and had to be amputated, and his left middle finger was lacerated.