TPT May 2013

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24.05.2012 14:22:21

data suggested that temperatures might have shot much higher in that battery than in the one on the plane in Boston. If that is true, he told the Times , Boeing and the FAA might need to add more steps to the safety plan to guard against such possibilities. › Boeing has much at stake with the Dreamliner, the first commercial jet to be built mostly of lightweight composite materials. The company has orders for 800 more of the planes. With penalties looming on the grounded Dreamliner, Boeing sought advice on its battery problems from other big names The supplier of lithium-ion batteries to Boeing Co for its 787 jet was reported by Bloomberg News to have tightened quality checks after the planemaker sought advice from other companies that use the technology. Writing from the Seattle-area divisional headquarters of Boeing Commercial Airplanes (Renton, Washington), Bloomberg cited input from five people with knowledge of the matter. These sources said that Boeing tapped Ford, General Motors, General Electric, United Technologies and others to provide expertise after battery faults grounded the global 787 fleet on 16 January. (“Boeing Sought Lithium-Ion Battery Advice of GM, Ford,” 7 March)

hazardous gases outside the plane. Mr Wilhelm noted that the battery containment box in the JAL plane was made of thin aluminium alloy just 0.063" thick. The heavily damaged box was buckled by the fire. (“NTSB Offers New Details on Boeing 787 JAL Battery Fire,” 7 March) The NTSB report includes extensive photographs that had not been shared before, of the box and cells, as well as magnifications of specific burn areas. It also includes flight recorder data from the JAL 787, test results of battery components, and a list of planned and ongoing investigative activities. Christopher Drew, who covers military contracting and Pentagon spending for the New York Times, took note of the consensus among aviation analysts that the Boeing plan would probably protect against the main problem addressed by the NTSB: a short-circuit in a cell triggering a chemical reaction leading the battery to overheat. “But investigators in Japan have suggested that something else may have caused the battery on an All Nippon Airways 787 to emit smoke on a flight on 16 January,” Mr Drew wrote (7 March). “They said the battery may have been hit by a surge of electrical current from another part of the plane.” Donald R Sadoway, a professor of materials chemistry at the Massachusetts Institute of Technology, said the Japanese the other incident

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May 2013