By Ted Reed TheStreet.com Staff Repor= US Airways Pilots Sue Airline =0A=0ABy Ted Reed=0ATheStreet.com Staff Repor= ter=0A2/28/2007 5:38 PM EST=0AClick here for more stories by Ted Reed=0A=0A= =0A=0A=0A=0A=0ACyberTrader=0AFidelity Investments=0A=0AZecco.com=0AE*TRADE = Financial=0A=0ACharles Schwab=0ATD AMERITRADE=0A=0A=0APilots at US Airways = (LCC - Cramer's Take - Stockpickr) have sued the airline, charging that the= ir contract is being violated in the company's haste to merge predecessors = America West and the old US Airways. =0AThe suit, filed Wednesday in U.S. D= istrict Court in Philadelphia, said the carrier plans to eliminate America = West's "HP" designator code from reservation systems on Sunday morning, ena= bling it to list all flights as US Airways flights. =0AThe lawsuit contends= that integration plans must be halted until the airline signs a single pil= ots' contract, as required by the Railway Labor Act and the transition agre= ement negotiated in September 2005 with Air Line Pilots Association chapter= s at both previous carriers. =0AThe two carriers combined when the former U= S Airways emerged from bankruptcy protection that month. =0A"The only road = to a real merged airline is through a single contract," said Jack Stephan, = chairman of the US Airways pilots, in a prepared statement. "Our pilot grou= p will not tolerate management attaining synergies they haven't paid for or= negotiated." =0AThe two sides have been negotiating for a year and a half = but have made little progress. "Instead of focusing on productive negotiati= ons, management is trying to grab operational efficiencies they can't legal= ly have," added John McIlvenna, chairman of the America West pilots. =0AAn = airline spokesman declined to comment in advance of seeing the lawsuit.