An employee was repairing the drive motor of a carcass-carrying cart. The employee raised the hinged slide and secured it with the chain attached to the slide. He then raised the cart off the ground by using the winch on the cart so that he could place wooden blocks underneath it. When the employee lowered the cart onto the blocks, the chain holding the slide in the upward position loosened, causing the slide to fall. The employee's left index finger was caught between the slide and metal plate, resulting in the amputation of his fingertip.