American Airlines Boeing 737-800 [N975AN] push back, start up, and takeoff from DFW

Flight info: Airline: American Airlines Aircraft: Boeing 737-823 Reg: N975AN Livery: Normal Seat: 20A Airport: Dallas Fort Worth International Airport Runway: 36R Gate: B12 Flight #: AA1460 Route: DFW-PDX Date: 03.03.20 Time: 10:46AM Comments: First time leaving from terminal B on a mainline flight!