The Federal Aviation Administration on Friday approved Boeing to make adjustments to the battery system of the 787 Dreamliner, paving the way for the planes to return to service within weeks.
Boeing revamped the internal battery components to minimize the chances of a short circuit. It also improved the insulation of the battery cells, and created a new "containment and venting" system that is supposed to prevent overheating from affecting the plane.
Almost 50 Dreamliners have been grounded for the last four months, after two fires on Japanese jets prompted the FAA to order the planes grounded on Jan. 16. Other global regulators also must approve Boeing's new design but are expected to do so soon.
The grounding of the 787 Dreamliner has cost Boeing an estimated $600 million and forced some airlines to lease alternative aircraft. Several airlines have said they will seek compensation from Boeing, further adding the company's losses.
"Safety of the traveling public is our number one priority. These changes to the 787 battery will ensure the safety of the aircraft and its passengers," said Transportation Secretary Ray LaHood.
Boeing is working to double 787 production in 2013 to help fill a backlog of more than 800 orders for a plane whose list price starts at about $207 million. Eight carriers have received the jet since it began commercial service in late 2011 after more than three years of delays.
