The NTSB is stepping up its probe into the lithium battery that caught fire aboard the JAL...

|By:, SA News Editor

The NTSB is stepping up its probe into the lithium battery that caught fire aboard the JAL Dreamliner three weeks ago, in an effort to determine whether internal defects may have played a role in the blaze. The agency is working with Naval electronics experts to look for signs of "in-service damage and manufacturing defects" affecting the battery as well as subtle "signs of any degradation in expected performance," So far, investigators have failed to uncover any clear-cut evidence about the fire's cause.