Boeing Co. has conducted the final test flight of its 787 Dreamliner to demonstrate the safety of troubled aircraft's new battery system, as part of a U.S. Federal Aviation Administration certification exam.

"Today's flight marks the final certification test for the new battery system, completing the testing required by the FAA," Boeing spokesman Marc Birtel said in a press release Friday after the flight.

The company said the test flight was "uneventful" and that "the certification demonstration plan was straightforward."