AMF Bowling Worldwide Inc., the world's largest bowling alley operator, filed for bankruptcy protection for the second time in 12 years saying that recent economic weakness has cost it business and left it with an unmanageable debt burden, Reuters reported yesterday. The Mechanicsville, Va.-based company said that it has agreed on a plan to significantly reduce its debt and turn over control to its lenders, enabling it to emerge from chapter 11 before the end of April 2013. AMF and 15 affiliates sought protection from creditors saying that the company had between $100 million and $500 million of both assets and liabilities.