US Airways Group Inc. and American Airlines have appointed executives to lead their plan to integrate into what they said to be the biggest air carrier in the world, according to sources.

US Airways president Scott Kirby and AMR Corp.'s American chief restructuring officer Bev Goulet are set to establish plans to initiate the combination of the two airlines as soon as the merger, worth $11 billion, is closed, which is expected to happen in the third quarter, the carriers' chief executives revealed in a memo.

It is anticipated that the merger between the two airlines would generate revenue of more than $38 billion based on figures in the earlier year, surpassing United Continental Holdings Inc.

The memo stated that Kirby had been playing an important role in the negotiation with labor and the analysis of revenue and costs benefits expected from the integration.

In December 2011, Goulet, who has served as vice president for corporate development at American Airlines since 2002, was appointed as American chief restructuring officer.

In a U.S. filing last week, the parent of the combined airline will be named American Airlines Group Inc.

The merger was concluded following the Chapter 11 bankruptcy protection filed by American in late November 2011.