By David Ljunggren OTTAWA (Reuters) - Boeing Co, locked in a trade dispute with the Canadian government, has applied to stay in the race to supply Canada with 88 new fighter jets, three well-placed sources said on Thursday. Companies had until Feb. 9 to express an interest in taking part in a competition for planes worth between C$15 billion ($12.1 billion) and C$19 billion. Ottawa will release its specifications next year, at which point firms can bid. Boeing did let Canada know it was interested, said the sources, who requested anonymity because they were not authorized to speak to the media. The decision does not mean the firm will necessarily put forward its F-18 Super Hornet. Boeing did not immediately respond to a request for comment. The U.S. aerospace company infuriated the Canadian government last year by launching a trade challenge against planemaker Bombardier Inc