Boeing Co. said it plans a nearly two-hour test flight of a 787 Dreamliner to test its proposed fix for the lithium-ion battery systems that led to the commercial jet’s grounding in January.
The flight on Monday is the latest attempt by the aerospace giant to win approval from the Federal Aviation Administration and get the 787 fleet airborne again.
During the test, the 787 — a production airplane built for LOT Polish Airlines — was scheduled to take off at 11 a.m. Pacific time and land at Paine Field in Everett, Wash. The flight plan (which is subject to change) can be viewed on the FlightAware website.
FULL COVERAGE: Boeing's troubled Dreamliner
Boeing said the test flight will later be followed by certification ground and flight demonstrations in the coming days.
The Chicago company unveiled a plan to fix the 787 battery system on March 14. It involves insulating and spacing out parts in the battery unit, reducing charging levels so the battery cannot be overcharged and enclosing the lithium-ion batteries in stainless-steel cases so little oxygen can get at them.
Boeing officials have been busy addressing concerns about the company's new flagship jet, which has been grounded worldwide since Jan. 16 after two overheating incidents within two weeks involving the battery systems.
The redesign removes any risk of a fire breaking out within the battery system, the company said.
"The enclosure eliminates all possibility of a fire," Mike Sinnett, chief project engineer for the 787 program, said earlier this month. "A fire can’t begin, develop or be sustained."
The proposal has already won approval from the FAA, and Boeing said it believes that the fix could be applied to the planes in "weeks."
Boeing has delivered 50 787s to eight airlines worldwide. Six are owned by United Airlines -- the only U.S. carrier that has 787s in its fleet.
But all 787s have been grounded since a battery fire broke out Jan. 6 on a 787 operated by Japan Airlines at Boston's Logan International Airport and then a second battery incident occurred 10 days later on an All Nippon Airways flight in Japan.
The 787's battery system, which is made in Japan by Kyoto-based GS Yuasa Corp., contains a cluster of eight individual cells packaged together in one box.
The National Transportation Safety Board has been investigating the matter, as have officials from Boeing, the FAA, the Navy, Japan and France.
Not one of them has found a root cause for the incidents.
"We may never get to the single root cause," Sinnett said. "But the process we have applied to understanding what improvements can be made is the most robust process we’ve ever followed in improving a part in history."
Boeing has taken a total of 890 orders for the Dreamliner from airlines and aircraft leasing firms around the world. Depending on the version ordered, the price ranges from $206.8 million to $243.6 million per jet.
The Chicago-based company currently is making five Dreamliners a month, with plans to reach 10 per month late this year.
The company said in a recent financial statement that it expected "no significant financial impact" from the 787 grounding this year, even though it will not deliver any new 787s as long as the plane is grounded.