The US National Transportation Safety Board has ruled out excess voltage as the cause of a battery fire on the Boeing 787 Dreamliner jet operated by Japan Airlines at Boston airport this month, the agency said on Sunday.
Last week, governments across the world grounded the Dreamliner jet after a problem with a lithium-ion battery on a second 787 plane, flown by All Nippon Airways, forced the jet to make an emergency landing in western Japan.
"Examination of the flight recorder data from the JAL B-787 airplane indicates that the APU (auxiliary power unit) battery did not exceed its designed voltage of 32 volts," NTSB said in a statement forwarded by a Boeing Japan representative.
On Friday, a Japanese safety official told reporters that excessive electricity may have overheated the battery in the ANA-owned Dreamliner which was forced to make an emergency landing at Japan's Takamatsu airport last week.
US investigators have examined the lithium-ion battery that powered the APU, where the battery fire started in the JAL plane, as well as several other components removed from the airplane, including wire bundles and battery management circuit boards, the NTSB statement said.
On Tuesday, the investigating group will convene in Arizona to test and examine the battery charger and download non-volatile memory from the APU controller, it added.
Japan's GS Yuasa Corp makes batteries for the Dreamliner, while France's Thales makes the control systems for the battery.
* Reuters
THE BIG MATCH
Arsenal v Manchester City,
Sunday, Emirates Stadium, 6.30pm
Other acts on the Jazz Garden bill
Sharrie Williams
The American singer is hugely respected in blues circles due to her passionate vocals and songwriting. Born and raised in Michigan, Williams began recording and touring as a teenage gospel singer. Her career took off with the blues band The Wiseguys. Such was the acclaim of their live shows that they toured throughout Europe and in Africa. As a solo artist, Williams has also collaborated with the likes of the late Dizzy Gillespie, Van Morrison and Mavis Staples.
Lin Rountree
An accomplished smooth jazz artist who blends his chilled approach with R‘n’B. Trained at the Duke Ellington School of the Arts in Washington, DC, Rountree formed his own band in 2004. He has also recorded with the likes of Kem, Dwele and Conya Doss. He comes to Dubai on the back of his new single Pass The Groove, from his forthcoming 2018 album Stronger Still, which may follow his five previous solo albums in cracking the top 10 of the US jazz charts.
Anita Williams
Dubai-based singer Anita Williams will open the night with a set of covers and swing, jazz and blues standards that made her an in-demand singer across the emirate. The Irish singer has been performing in Dubai since 2008 at venues such as MusicHall and Voda Bar. Her Jazz Garden appearance is career highlight as she will use the event to perform the original song Big Blue Eyes, the single from her debut solo album, due for release soon.
UAE currency: the story behind the money in your pockets
