On July 20, 2011, American announced an order for 460 narrowbody jets including 260 Airbus A320s. The order broke Boeing's monopoly with the airline and forced Boeing into the re-engined 737 MAX. As this sale included a Most-Favoured-Customer Clause, the European airframer has to refund any difference to American if it sells to another airline at a lower price, so Airbus can't give a competitive price to competitor United Airlines, leaving it to a Boeing-skewed fleet.
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