The delivery date revision follows an assessment of the availability of an engine needed for the final phases of flight test this fall.
While Boeing works closely with Rolls-Royce to expedite engine availability, flight testing across the test fleet continues as planned.
Boeing said last month that the cumulative impact of a series of issues, including supplier workmanship issues related to the horizontal stabiliser and instrumentation delays could push first delivery of the 787 a few weeks into 2011. The delay in engine availability has extended that estimate to mid-first quarter 2011.
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