By Blaise Robinson and Tim Hepher
PARIS (Reuters) - Shares in Airbus parent EADS
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Sources told Reuters the board of parent AMR
The airline is expected to unveil the order for Boeing 737 and Airbus A320neo-family jets at around 1100 GMT on Wednesday.
American Airlines last ordered Airbus planes in the late 1980s and declared in 1996 Boeing would be its exclusive airplane provider through 2018. If Airbus wins all or even part of a big order from the carrier, it would be a coup.
"We're talking about a massive order, and EADS will probably get a big chunk of it. EADS's stock has risen a lot lately, but they still have a pretty strong momentum," a Paris trader said.
In late morning trading, EADS shares were up 2.9 percent at 24.62 euros after rising as much as 4.3 percent in brisk volume.
The deal is also expected to provide a boost to General Electric
Estimates for the overall size of the deal expected to be split between Airbus and Boeing range from 200 to 400 airplanes, with options for later sales. A source close to the talks said the higher number was "within the realm of possibility."
The board vote follows tense haggling that saw Boeing agree to match Airbus and update its best-selling 737 medium-haul jet with new engines to offer fuel savings, industry sources said. That marks a retreat from ambitious plans for a full redesign.
AMR, Boeing and Airbus declined to comment on the talks.
The European company said last year it would put a more fuel-efficient engine in its A320 family and call it A320neo." The A320neo aircraft is scheduled to enter service in late 2015.
Boeing has debated whether to redesign its 737, a workhorse for airlines around the world, or put a new engine in it.
Experts say re-engining should deliver fuel savings of 15 percent. Up to 25 percent could be achieved by an all-new plane but it would cost five times more to build, or $10 billion.
(Additional reporting by Kyle Peterson and Karen Jacobs; Editing by Jon Loades-Carter)