The National Transportation Safety Board began disassembling an auxiliary power unit in its investigation of a fire on a Boeing 787 Dreamliner in Boston.
Boeing's fleet of Dreamliners -- its newest and most advanced plane -- was grounded by the Federal Aviation Administration after a series of electrical fires related to its lithium-ion batteries.
The investigation team had already disassembled the main batteries in the plane that caught fire after passengers disembarked in Boston and one other that caught fire and forced an emergency landing in Japan. The NTSB determined the batteries had not exceeded their designed voltage of 32 volts.
The NTSB has moved on to taking apart the eight cells of the APU charging unit from the Boston plane in its materials laboratory in Washington, a release from the board said.
"Examinations of the cell elements with a scanning-electron microscope and energy-dispersive spectroscopy are ongoing," the release said.
"A cursory comparative exam has been conducted on the undamaged main battery. No obvious anomalies were found. More detailed examination will be conducted as the main battery undergoes a thorough tear down and test sequence series of non-destructive examinations," the NTSB said.
Most Popular Stories
- Schedule packed with talent at the Fox
- Entrepreneurs Chase Social Media
- European Car Sales up First Time in 20 Months
- I never set out to be a role model but it's great to be one ; IN THE HOTSEATBetter known by his stage name Wretch 32, Jermaine Sinclair is a 28-year-old rapper from London. In 2011 his debut album Black and White sold over a million copies and scored three top five singles. His latest single Blackout was released this week
- Austin musicians point to a variety of reasons to appreciate McCartney
- Manila's Hollywood Week
- Promoter McLean 'provided more musical joy than Dylan and Prince combined'
- SINCE YOU ASKED [Pittsburgh Tribune-Review (PA)]
- Financial Times Twitter, Email Hacked
- The Blade, Toledo, Ohio, TK Barger column