Airbus Thursday submitted its bid for a 35-billion-dollar US Air Force contract also eyed by bitter rival Boeing.
Airbus' parent firm EADS confirmed in Washington that the 8,800-page bid was made ahead of the Friday deadline for bids to supply new aerial refueling tankers to the US Air Force.
"We are proud of our offering, which is the only one in this competition that is flying and refueling today," said EADS North America chairman Ralph Crosby.
The European firm is proposing a military version of its A330, the KC-45.
Boeing is expected to submit its proposal on Friday.