PARIS, Oct 26, 2006 (AFP) - New low-cost US airline Skybus has placed a firm order for 65 Airbus A319 airliners, at a catalogue price of about 3.9 billion dollars (3.1 billion euros), the European aircraft manufacturer Airbus said on Thursday. Airbus, which is working on a vast restructuring plan to tackle production problems, said that Skybus had not yet decided which engines to order for the single-aisle aircraft. Airbus said: "In terms of aircraft, this transaction is one of the main orders placed with Airbus by an American airline." Skybus, based in the state of Ohio, is to begin...