Boeing's new 787 Dreamliner passenger aircraft has successfully completed its first test flight in the US. The three-hour flight started from Everett, north of Seattle, and the plane landed at Boeing Field, just south of Seattle. The 787 project had been delayed by two-and-a-half years following a series of hitches, including design problems. Boeing has pegged its hopes to the Dreamliner, which promises to be one of the world's most fuel-efficient planes. The two test pilots carried out a number of basic system checks, including testing the landing gear and flaps. "The airplane responded just as we expected," said Randy Neville, one of the pilots. "It was a joy to fly."