“TOKYO (AP) — Japanese authorities have identified the causes of fuel leaks and other problems withBoeing’s 787 but are still investigating the more serious battery problem that forced an emergency landing in January and the worldwide grounding of the jets.
An oil leak was caused by an improper paint job that led to a switch not working properly, while inadequate taping led to cracks in cockpit glass, and a faulty part led to braking problems, according to the Transport Ministry’s investigation released Friday into problems that occurred with the 787 Dreamliner in January.
The government issued orders to fix the problems with 787s operated by Japan Airlines and All Nippon Airways, the country’s two major carriers and the biggest customers for Boeing Co.’s new jet.
All 50 of the 787 jets in service around the world have been grounded for more than a month after a lithium-ion battery in a 787 operated by ANA overheated Jan. 16, forcing an emergency landing inwestern Japan. Earlier in January, a lithium-ion battery caught fire in a Japan Airlines 787 parked in Boston.
Boeing and U.S. authorities are also investigating, but Friday’s findings shed little light on the main problem.
The 787 is the first jet to extensively use lithium-ion batteries, which weigh less, charge faster and are more powerful than other kinds of batteries. Japanese manufacturer GS Yuasa makes the batteries for Boeing….”
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