Boeing Asks U.S. FAA to Permit Test Flights With Dreamliner

Boeing Asks U.S. FAA to Permit Test Flights With Dreamliner

Andrew Harrer/Bloomberg

A damaged battery case from a Boeing Co. 787 Dreamliner sits at the National Transportation Safety Board materials laboratory in Washington, D.C., as regulators and Boeing are still trying to determine what caused the battery fire on one jet and a cockpit warning that spurred an emergency landing by another.