September 26, 2007, as part of the integration efforts following the merger of US Airways Group and America West Holdings in September 2005, AWA surrendered its Federal Aviation Administration (“FAA”) operating certificate. As a result, all future mainline airline operations will be conducted under US Airways’ FAA operating certificate. In connection with the combination of all mainline airline operations under one FAA operating certificate, US Airways Group contributed one hundred percent of its equity interest in America West Holdings to US Airways. As a result, America West Holdings and its wholly owned subsidiary, AWA, are now wholly owned subsidiaries of US Airways. In addition, AWA transferred substantially all of its assets and liabilities to US Airways. All off-balance sheet commitments of AWA were also transferred to US Airways. This transaction constitutes a transfer of assets between entities under common control and was accounted for at historical cost.