NEW : Ex-DOT official tweets that burn marks are not next to the batteries . The lone U.S. 787 operator -- United Airlines -- owns a fleet of six . FAA says it 's sending `` an official '' to Heathrow after Dreamliner fire . Comment: A fire breaks out on an empty Ethiopian Airlines Boeing 787 at Heathrow airport .
NEW : Ex-DOT official tweets that burn marks are not next to the batteries . FAA says it 's sending `` an official '' to Heathrow after Dreamliner fire . Comment: A fire breaks out on an empty Ethiopian Airlines Boeing 787 at Heathrow airport .