Airbus, the world's largest plane-maker, said earlier this month it would spend roughly $1.3 billion to improve efficiency of its A320 aircraft by upgrading it with engines that offer 15 percent fuel savings.
Boeing was mulling whether to upgrade its competing 737 plane, as airlines and the market welcomed the Airbus announcement on December 1.
"We certainly can't see a compelling reason to do it," Jim Albaugh said in an interview published in the Friday's edition of the newspaper.
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