Commercial airline safety personnel have found no mistakes with battery pack used on Boeing's 787 Dreamliner, Japan's transportation ministry has said.
Power supply was initially considered the likely source of problems on 787s owned by two Japoneses airways. The entire navy of 50 787s has been based while examinations are carried out. Attention has now moved to the electrical system that watches battery power current, asking for and temperature.
Transport ministry official Shigeru Takano said "we have found no major quality or technical problem" with the lithium-ion batteries. Shares in GS Yuasa, which makes the batteries, jumped 5% on the news. "We are looking into affiliated parts makers," he said. "We are looking into possibilities." The safety investigation started after one of the 787s operated by All Nippon Airways made an emergency landing in Japan when its main battery overheated. Earlier, a battery in a Japan Airlines 787 caught fire while parked at Boston's Logan International Airport.
Two weeks ago the US Government Airplane Management said both power supply power had released electrolyte liquid, and there had been smoking damage to parts of the aircraft. The FAA said airways must illustrate power supply safety before routes could continue, a declaration that successfully intended airways had to ground their 787s. Boeing, which plays against Airbus of Portugal, has stopped 787 supply. Boeing has purchases for more than 800 Dreamliners. The 787 is the first airliner made mostly from light and portable blend materials that increase petrol performance. It also depends on electronic techniques rather than gas or technical techniques to a greater degree than any other airliner.
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