Boeing probe focuses on battery, 787 deliveries halted
By Antoni Slodkowski
SEATTLE/TAKAMATSU, Japan (Reuters) - U.S. and Japanese aviation safety officials finished an initial investigation of a badly damaged battery from a Boeing Co 787 Dreamliner jet on Friday as Boeing said it was halting deliveries until the battery concerns were resolved.
Boeing said it would continue building the new, lightweight carbon-composite 787, but deliveries were on hold until the U.S. Federal Aviation Administration approved a plan for addressing safety concerns about lithium-ion batteries that caused the agency to ground the new airplane earlier this week.
In Washington, the top U.S. transportation official, Ray LaHood, said the 787 would not fly until regulators were "1,000 percent sure" it was safe. A week earlier, LaHood said he would not hesitate to travel on a Dreamliner.
Officials from the Federal Aviation Administration (FAA), U.S. National Transportation Safety Board (NTSB) and Boeing joined Japanese authorities looking into what caused warning lights to go off this week on an All Nippon Airways Co domestic flight, prompting the aircraft to make an emergency landing at Takamatsu airport in western Japan.
The incident prompted regulators in the United States and around the world to ground the 50 Dreamliners in service. [ID:nL1E9CH8CJ] The jet has been flying safely for 15 months, carrying more than 1 million passengers, but it has run into problems in recent weeks, including problems with fuel leaks.
The biggest safety concerns centered on its lithium-ion batteries, which are lighter than conventional batteries, pack more energy and are faster to recharge, but are also potentially flammable.
When the FAA announced the grounding of all six U.S.operated 787s on Wednesday, the agency said airlines would have to demonstrate the batteries were safe and in compliance with its rules. It said both battery failures resulted in the release of flammable chemicals, heat damage and smoke -- all of which could damage critical systems on the plane and spark a fire in the electrical compartment.
A Japanese safety official at Takamatsu airport told reporters that excessive electricity may have overheated the battery and caused liquid to spill out. Pictures released by investigators of the battery showed a burnt-out blue metal box with clear signs of liquid seepage. Continued...