'We're working a revised program schedule that will accommodate the known issues and discoveries on the program, including the work backlog that exists in the factory as well as the remainder of flight test and certification,' Yvonne Leach, Boeing 787 Program Communications said. 'We expect to finalize it in the coming weeks.'
'We have always acknowledged that new airplane programs are difficult and that bringing innovation to the market takes hard work,' she added.
Boeing also said that production of the wide-body 777 would rise to 8.3 per month in the first quarter of 2013. In March, the company had announced it would boost output to seven planes from five a month starting in mid-2011.
Boeing and EADS unit Airbus suffered a slump in orders in 2008 and 2009 amid the recession. Now, demand is resuming as air traffic trends recover.