Employees were conducting repair operations and lifting an 850-pound 8" pipe with a winch and swiveling block and tackle while working at a height of 15 feet. The employees were trying to position the pipe as they were hoisting it into place when the swivel bound, causing the lifting cable bind and break. A secondary come-a-long and chain kept the pipe from falling, but the pipe swung into an employee, fracturing a vertebra in his neck, breaking his left arm in two places and fracturing his wrist.