1 / 25

Investigative Update of Battery Fire Japan Airlines B-787 - Jan 7, 2013

Investigative Update of Battery Fire Japan Airlines B-787 - Jan 7, 2013 . Deborah A.P. Hersman Chairman January 24, 2013. Timeline – JAL Battery Incident. 10:06am - aircraft arrived at gate in Boston from Narita, Japan 183 passengers and 11 crew deplaned

keola
Download Presentation

Investigative Update of Battery Fire Japan Airlines B-787 - Jan 7, 2013

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Investigative Update of Battery FireJapan Airlines B-787 - Jan 7, 2013 • Deborah A.P. Hersman • Chairman • January 24, 2013

  2. Timeline – JAL Battery Incident • 10:06am - aircraft arrived at gate in Boston from Narita, Japan • 183 passengers and 11 crew deplaned • 10:32am - Cleaning and maintenance crew noticed smoke in cabin • 10:35am - Mechanic noted flames coming from APU battery in aft electronics bay

  3. Timeline, cont. • 10:37am – Airport Rescue & Fire Fighting notified • 10:40am – Fire and rescue personnel arrive on scene • 12:19pm – Fire and rescue personnel report event was “controlled”

  4. APU Battery Exemplar Battery JAL Event Battery

  5. Damage to Aft Electronics Bay

  6. Main battery location Auxiliary Power Unit (APU) battery location

  7. Investigative Activities • Battery exam and teardown at NTSB Materials Laboratory • Component exam and teardown • Tucson, AZ – Battery Charger Unit and Start Power Unit (Securaplane Technologies) • Phoenix, AZ – APU Controller (United Technology Aerospace Systems) • Seattle, WA – Two General Purpose Modules (Boeing Commercial Airplanes) • Fujisawa, Japan – Battery Monitoring Unit (Kanto Aircraft Instrument)

  8. JAL APU Battery Cells Exemplar Battery JAL Event Battery

  9. Cell Nominal capacity (Ah) Nominal voltage Operational voltage range (V) Weight (lb.) Dimensions (in.) 75 3.7 2.5 – 4.025 6.0 5.2 2.0 7.7 W D H Cell and Battery Specifications Battery 75 29.6 20 – 32.2 63 10.9 14.2 8.5

  10. Cell Design 7.7 (including terminal) 7 .0 5.2 2.0 (Unit : inch)

  11. Electrodes Negativeterminal Positive terminal Current collector Negative electrode Separator Positive electrode Case Rupture valves

  12. Electrode Construction separator 25 μm graphite Cu 10 μm graphite separator 25 μm Li-CoO2 Al 20 μm Li-CoO2 Not to scale

  13. Example of a Cell CT Scan

  14. NTSB Lab Activities

  15. Cell Examinations To Date • CT scan of entire assembly 8 1 • CT scan • disassembled SEM – Scanning Electron Microscopy 2 7 • CT scan • disassembled • disassembled • SEM EDS – Energy Dispersive Spectroscopy 6 • CT scan 3 • CT scan • disassembled • CT scan 5 4 • disassembled • CT scan • SEM • EDS

  16. We Are Looking For: • Signs of thermal runaway • Signs of electrical short circuiting • Manufacturing defects • “Anything unusual”

  17. Damaged Electrode - Internal Short Circuit Hole

  18. Cell 6 CT Scan

  19. CT Scan of Battery

  20. Findings To Date • Fire was present • Signs of thermal runaway • Signs of electrical short circuiting

  21. Next Steps • Complete the in-house laboratory examinations • Conduct examinations and testing of exemplar batteries • Synthesize lab examination findings with fire forensics and aviation systems investigation

  22. Parties to Investigation • Federal Aviation Administration • Boeing Commercial Airplanes • Accredited Representatives • Japan – JTSB • GS Yuasa • Japan Airlines • France – BEA • Thales Avionics Electrical Systems • Technical assistance provided by Carderock Division, Naval Surface Warfare Center

  23. JTSB InvestigationANA Battery Event Photo by Reuters/Kyodo/Landov

More Related