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.

More in Herald Business Journal

Exec director of Future of Flight in Mukilteo stepping down

A former board president will temporarily lead Snohomish County’s most popular tourism attraction.

Seafood producer Keyport moves corporate HQ to Edmonds

The family business sees the city as business friendly — and able to accommodate expansion.

Ex-Boeing executive Ray Conner joins Alaska Air board

Alaska Air Group said his appointment affirms the company’s commitment to its Northwest roots.

Peoples, HomeStreet banks bump lowest salaries after tax cut

The banks with Snohomish County branches will raise minimum salaries for employees to $15 an hour.

Amazon opens store with no cashiers, lines or registers

The Seattle store allows shoppers to use a smartphone app to pay for items they want.

Trump hits solar panels, washing machines with tariffs

The administration cast the decisions as part of his pledge to put American companies and jobs first.

Electroimpact cuts Mukilteo staff by 9 percent

“What we’re missing now is a monster anchor project,” the company’s VP said.

Exotic animals find compassionate care in Bothell (video)

At the Center for Bird and Exotic Animal Medicine, vets treat snakes, hedgehogs and even kangaroos.

Most Read