NTSB sees no anomalies in 787 battery cells; more tests

The cause of a Jan. 7 battery fire on a Boeing 787 remains unknown Friday as officials bring in more battery experts and continue their investigation.

The National Transportation Safety Board released a seventh update on its investigation into the fire last month aboard a Japan Airlines 787 parked at Logan International Airport in Boston. Boeing’s 787 has been grounded since Jan. 16.

Here’s a list of new information from the NTSB:

  • The auxiliary power unit battery was the original battery delivered with the airplane on Dec. 20, 2012. All eight battery cells came from the same manufacturing lot; the battery was installed on the aircraft Oct. 15, 2012.
  • Testing this week, which includes electrical and mass measurements and infrared thermal imaging, shows no anomalies in the individual battery cells.
  • The cells are undergoing CT scanning to examine their internal condition.
  • A battery expert from the Department of Energy joined the investigative team on Thursday to lend his expertise to the ongoing testing and validation work.
  • Next week, the NTSB battery testing team will initiate a non-invasive “soft short” test of all battery cells to find high resistance or “soft” shorts within a cell.
  • An NTSB investigator will travel to France with the battery contactor from the JAL event battery, for examination at the manufacturer. The battery contactor connects a wiring bundle from the airplane to the battery.

Meanwhile, Japan’s Civil Aviation Bureau is sending investigators to Everett — one of two sites where Boeing assembles its Dreamliner. Japan’s aviation officials are investigating a Jan. 15 battery failure aboard an All Nippon Airways 787. That aircraft was forced to make an emergency landing in Japan.

ANA, the Dreamliner’s launch customer, said yesterday that the jet’s grounding has cost it about $15.4 million in lost revenue.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Business

Black Press Media operates Sound Publishing, the largest community news organization in Washington State with dailies and community news outlets in Alaska.
Black Press Media concludes transition of ownership

Black Press Media, which operates Sound Publishing, completed its sale Monday (March 25), following the formerly announced corporate restructuring.

Maygen Hetherington, executive director of the Historic Downtown Snohomish Association, laughs during an interview in her office on Thursday, Feb. 15, 2024, in Snohomish, Washington. (Ryan Berry / The Herald)
Maygen Hetherington: tireless advocate for the city of Snohomish

Historic Downtown Snohomish Association receives the Opportunity Lives Here award from Economic Alliance.

FILE - Washington Secretary of State Steve Hobbs poses in front of photos of the 15 people who previously held the office on Nov. 22, 2021, after he was sworn in at the Capitol in Olympia, Wash. Hobbs faces several challengers as he runs for election to the office he was appointed to last fall. (AP Photo/Ted S. Warren, File)
Secretary of State Steve Hobbs: ‘I wanted to serve my country’

Hobbs, a former Lake Stevens senator, is the recipient of the Henry M. Jackson Award from Economic Alliance Snohomish County.

Mark Duffy poses for a photo in his office at the Mountain Pacific Bank headquarters on Wednesday, Feb. 14, 2024 in Everett, Washington. (Annie Barker / The Herald)
Mark Duffy: Building a hometown bank; giving kids an opportunity

Mountain Pacific Bank’s founder is the recipient of the Fluke Award from Economic Alliance Snohomish County.

Barb Tolbert poses for a photo at Silver Scoop Ice Cream on Thursday, Feb. 29, 2024 in Arlington, Washington. (Annie Barker / The Herald)
Barb Tolbert: Former mayor piloted Arlington out of economic brink

Tolbert won the Elson S. Floyd Award, honoring a leader who has “created lasting opportunities” for the underserved.

Photo provided by 
Economic Alliance
Economic Alliance presented one of the Washington Rising Stem Awards to Katie Larios, a senior at Mountlake Terrace High School.
Mountlake Terrace High School senior wins state STEM award

Katie Larios was honored at an Economic Alliance gathering: “A champion for other young women of color in STEM.”

The Westwood Rainier is one of the seven ships in the Westwood line. The ships serve ports in the Pacific Northwest and Northeast Asia. (Photo provided by Swire Shipping)
Westwood Shipping Lines, an Everett mainstay, has new name

The four green-hulled Westwood vessels will keep their names, but the ships will display the Swire Shipping flag.

A Keyport ship docked at Lake Union in Seattle in June 2018. The ship spends most of the year in Alaska harvesting Golden King crab in the Bering Sea. During the summer it ties up for maintenance and repairs at Lake Union. (Keyport LLC)
In crabbers’ turbulent moment, Edmonds seafood processor ‘saved our season’

When a processing plant in Alaska closed, Edmonds-based business Keyport stepped up to solve a “no-win situation.”

Angela Harris, Executive Director of the Port of Edmonds, stands at the port’s marina on Wednesday, Jan. 24, 2024, in Edmonds, Washington. (Ryan Berry / The Herald)
Leadership, love for the Port of Edmonds got exec the job

Shoring up an aging seawall is the first order of business for Angela Harris, the first woman to lead the Edmonds port.

The Cascade Warbirds fly over Naval Station Everett. (Sue Misao / The Herald file)
Bothell High School senior awarded $2,500 to keep on flying

Cascade Warbirds scholarship helps students 16-21 continue flight training and earn a private pilot’s certificate.

Rachel Gardner, the owner of Musicology Co., a new music boutique record store on Thursday, Jan. 18, 2024 in Edmonds, Washington. Musicology Co. will open in February, selling used and new vinyl, CDs and other music-related merchandise. (Olivia Vanni / The Herald)
New Edmonds record shop intends to be a ‘destination for every musician’

Rachel Gardner opened Musicology Co. this month, filling a record store gap in Edmonds.

MyMyToyStore.com owner Tom Harrison at his brick and mortar storefront on Tuesday, Sept. 6, 2022 in Everett, Washington. (Olivia Vanni / The Herald)
Burst pipe permanently closes downtown Everett toy store

After a pipe flooded the store, MyMyToystore in downtown Everett closed. Owner Tom Harrison is already on to his next venture.

Support local journalism

If you value local news, make a gift now to support the trusted journalism you get in The Daily Herald. Donations processed in this system are not tax deductible.