787 Battery Fire Investigation

The National Transportation Safety Board's latest update on its 787 battery fire investigation shows just how detailed things get. The battery from a Japan Airlines 787 went to the NTSB's materials laboratory. Investigators X-rayed it, CAT scanned it, then disassembled it and examined each cell. Cells will be cut open to see what happened inside. The board said the flight recorder data shows the battery was not overcharged. The Wall Street Journal reports, another smoking battery on All Nippon Airlines was overcharged, meaning the two events might have different causes.