After three months of flight testing, Boeing Co. on Sunday completed an "ultimate load test" on its 787 Dreamliner, considered a major hurdle in winning approval for the innovative airplane. With its wings bent 25 feet upward, the test aircraft was subjected to stresses 150% greater than those encountered in the most extreme flying conditions. A similar test last May turned up weaknesses in the plane's fuselage, leading to a six-month delay. This time, the company says initial results look positive, though "more extensive analysis and review are required before the test can be deemed a success."

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