NTSB ISSUES SIXTH UPDATE ON JAL BOEING 787 BATTERY FIRE PROBE

(The following is a reformatted version of a press release
issued by The National Transportation Safety Board and received
via electronic mail. The release was confirmed by the sender.) 
NTSB ISSUES SIXTH UPDATE ON JAL BOEING 787 BATTERY FIRE
INVESTIGATION 
January 29, 2013 
WASHINGTON - The National Transportation Safety Board today
released the sixth update on its investigation into the Jan. 7
fire aboard a Japan Airlines Boeing 787 at Logan International
Airport in Boston. 
The examination of the damaged battery continues. The work has
transitioned from macroscopic to microscopic examinations and
into chemical and elemental analysis of the areas of internal
short circuiting and thermal damage. 
NTSB investigator Joseph Panagiotou examines a battery cell from
the JAL B-787 with a stereo microscope. 
Examination and testing of the exemplar battery from the JAL
airplane has begun at the Carderock Division of the Naval
Surface Warfare Center laboratories. Detailed examinations will
be looking for signs of in-service damage and manufacturing
defects. The test program will include mechanical and electrical
tests to determine the performance of the battery, and to
uncover signs of any degradation in expected performance. 
As a party contributing to the investigation, Boeing is
providing pertinent fleet information, which will help
investigators understand the operating history of lithium-ion
batteries on those airplanes. 
An investigative group continued to interpret data from the two
digital flight data recorders on the aircraft, and is examining
recorded signals to determine if they might yield additional
information about the performance of the battery and the
operation of the charging system. 
In addition to the activities in Washington, investigators are
continuing their work in Seattle and Japan. 
Additional information on the NTSB’s investigation of the Japan
Airlines B-787 battery fire in Boston is available at
http://go.usa.gov/4K4J. 
The NTSB will provide another factual update on Friday, Feb. 1,
or earlier if developments warrant. To be alerted to any updates
or developments, follow the NTSB on Twitter at
www.twitter.com/ntsb. 
Contact Information
Office of Public Affairs
490 L’Enfant Plaza, SW
Washington, DC 20594
(202) 314-6100 
(bjh) NY 
#<873920.660640.3.4.0.0.76>#
 
 
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