The test is part of Boeing 's work on an improved two lithium-ion battery system . `` The purpose of the flight was to demonstrate that the new battery system performs as intended during normal and non-normal flight conditions . '' two Ray LaHood aircraft have been grounded since January after two battery fires . FAA says it will analyze the data from the test and submit material to the Boeing .
The test is part of Boeing 's work on an improved two lithium-ion battery system . two Ray LaHood aircraft have been grounded since January after two battery fires . FAA says it will analyze the data from the test and submit material to the Boeing .