🇺🇸 N164NN - Airbus A321 231SL - American Airlines AAL1851/AA1851, Chicago O'Hare (ORD) to San Francisco (SFO) - 4.7 mi away @ 33950 ft, heading W at 510 mph. Spotted 19x before. [11:07:24 AM CDT] #A101C3 #N164NN #A321 #AMERICAN #AAL1851 #AA1851 #ADSB #ADSBbot