The proposed merger between US Airways and America West could hit a snag in the form of labor unhappiness. Though both airlines have the same unions representing the pilots and flight attendants, the two have different mechanics unions. There is the possibility that the merger, if successful, could lead to disputes over seniority and assignments. The Air Line Pilots Association would also scrutinize the deal to make sure its workers are protected.
See "US Airways and America West Plan to Merge", Micheline Maynard, The New York Times, May 19, 2005