The Air Line Pilots Association (ALPA), Association of Flight Attendants-CWA (AFA) and Transport Workers Union (TWU) have filed objections to American Airlines' proposed capacity purchase agreement with Republic Airways.
The unions all cite the concessions that they have made to American and American Eagle's parent AMR as part of the chapter 11 bankruptcy process, in separate court filings on 7 February.
"Given the long-term trends in the regional airline industry, it can reasonably be expected that AMR's decision to divert large RJ [regional jet] flying to a competitor will undermine the value of Eagle and threaten the livelihood of Eagle's pilots and other employees," says ALPA in its filing.
The TWU says: "Instead of re-gauging its fleet in line with the best interests of its employee groups, including TWU, American seeks to outsource work that could and should be done by American Eagle and its employees."
In response to the objections, American cites its court filing on the Republic agreement: "American has said for quite some time that it intends to diversify its regional feed. The recent announcement about flying large regional jets is consistent with previous statements and the company's plan for an increased use of large regional aircraft."
"American Eagle is working closely with American and the aircraft manufacturers to put together a comprehensive plan to access large regional aircraft in order to help fulfill the future needs of the business as it transitions from smaller regional jets to larger equipment over time," says the airline.
American announced a 12-year feeder agreement with Republic for 53 Embraer 175s that begins in June, on 24 January.