American Airlines has made a few changes to its longhair network from DFW for the Summer 2018 season.
One daily flight to Beijing (PEK) will switch from a Boeing 787-8 to a 787-9 as of August 4, 2018.
AA 78/81 to London Heathrow (LHR) will be operated by a 777-223/ER rather than a 777-323/ER between March 25 and June 6,
One daily flight to Madrid (MAD) will switch from a Boeing 787-9 to a 777-223/ER as of March 25, 2018.
One daily flight to Paris de Gaulle 9CDG) will switch from a Boeing 787-9 to a Boeing 777-223/ER on March 25.
One daily flight to Shanghai Pu Dong (PVG) will switch from a Boeing 787-8 to a 787-9 as of March 4, 2018.
Source - AirlineRoute.net