recommended reading

NTSB’s cursory exam of the Boeing 787’s main battery shows no problems

Elaine Thompson/AP

The National Transportation Safety Board said a “cursory comparative exam” found no obvious anomalies in the main lithium ion battery of the Japan Airlines Boeing 787 that caught fire on Jan. 7 at Logan International Airport in Boston.

After an All Nippon Airlines 787 battery started smoking while in flight on Jan. 16, regulators around the world, including the FAA, grounded all 50 aircraft in operation until Boeing fixes the battery problems.

Last Thursday, the NTSB reported that the lithium ion batteries in the JAL aircraft’s auxillary power unit experienced short circuits and a “thermal runaway” -- a rapid, uncontrolled increase in temperature. The NTSB, in a press release Sunday, said “more detailed examination will be conducted as the main battery undergoes a thorough tear down and test sequence series of non-destructive examinations.”

The main 787 battery is housed in a compartment under the cockpit; the APU battery is located in another compartment just aft of the wings, as shown in this schematic drawing. GS Yuasa of Kyoto manufactures the 787 batteries.

The NTSB said it conducted a test of an APU at manufacturer Securaplane’s lab in Tucson, Ariz., and the APU controller at UTC Aerospace Systems in Phoenix. “Both units operated normally with no significant findings,” the board said. UTC is a subsidiary of United Technologies and Securaplane is a subsidiary of U.K.-based Meggit PLC. Thales PLC, located in a Paris suburb, has a contract for the 787’s electrical power conversion system.

Two NTSB investigators have been dispatched to Seattle, with one assisting the FAA in its testing of Boeing’s 787 “root cause corrective efforts” and the other will take part on the FAA review of battery system special compliance documentation. In November 2007, FAA granted Boeing permission to operate the 787 under “special conditions,” which acknowledged the known flammability of lithium ion batteries

Threatwatch Alert

Thousands of cyber attacks occur each day

See the latest threats

JOIN THE DISCUSSION

Close [ x ] More from Nextgov
 
 

Thank you for subscribing to newsletters from Nextgov.com.
We think these reports might interest you:

  • It’s Time for the Federal Government to Embrace Wireless and Mobility

    The United States has turned a corner on the adoption of mobile phones, tablets and other smart devices, outpacing traditional desktop and laptop sales by a wide margin. This issue brief discusses the state of wireless and mobility in federal government and outlines why now is the time to embrace these technologies in government.

    Download
  • Featured Content from RSA Conference: Dissed by NIST

    Learn more about the latest draft of the U.S. National Institute of Standards and Technology guidance document on authentication and lifecycle management.

    Download
  • A New Security Architecture for Federal Networks

    Federal government networks are under constant attack, and the number of those attacks is increasing. This issue brief discusses today's threats and a new model for the future.

    Download
  • Going Agile:Revolutionizing Federal Digital Services Delivery

    Here’s one indication that times have changed: Harriet Tubman is going to be the next face of the twenty dollar bill. Another sign of change? The way in which the federal government arrived at that decision.

    Download
  • Software-Defined Networking

    So many demands are being placed on federal information technology networks, which must handle vast amounts of data, accommodate voice and video, and cope with a multitude of highly connected devices while keeping government information secure from cyber threats. This issue brief discusses the state of SDN in the federal government and the path forward.

    Download
  • The New IP: Moving Government Agencies Toward the Network of The Future

    Federal IT managers are looking to modernize legacy network infrastructures that are taxed by growing demands from mobile devices, video, vast amounts of data, and more. This issue brief discusses the federal government network landscape, as well as market, financial force drivers for network modernization.

    Download

When you download a report, your information may be shared with the underwriters of that document.