Boeing is delaying delivery of its first new-generation 787 Dreamliner aircraft until early 2011.
All Nippon Airways of Japan was due to take delivery of the aircraft at the end of this year.
The BBC reports the 787 project has already been delayed for more than two years, following a series of hitches.
Boeing said on Friday the setback was due to the availability of a Rolls-Royce engine needed for the final phases of flight testing.
It now expects All Nippon to take delivery of the aircraft in the middle of the first quarter of 2011.
The 787, being built in Seattle, is Boeing's most sophisticated plane yet.
ANA has ordered 55 Dreamliners, eight of which Boeing had promised to deliver by the end of March.
Qantas, Air New Zealand, and Air India have said they will seek compensation for previous 787 delays.
The 787 made its maiden flight in December 2009 and was a feature at the Farnborough international airshow in Britain in July.