Boeing says the delayed 787 Dreamliner plane will make its first flight by the end of this year.
The plane is more than two years late and Boeing says it hopes to deliver the first plane for service towards the end of 2010.
Previously it had been delayed five times, most recently in June. The BBC reports it is the company's first all-new jet since 1995.
It is designed to make use of carbon fibre to make it much lighter and more fuel efficient than aluminium aircraft. Last month, Boeing said it already had 850 orders.
Meanwhile, Air New Zealand says it has factored in another six-month delay to its order for 787 aircraft, despite having no advice from Boeing as to further delays.
The airline says it does not expect to receive the 787 aircraft until late in 2013.