🇺🇸 N919AK - Boeing 737MAX 9 - Alaska Airlines ASA9451/AS9451, Piedmont Triad (GSO) to Seattle-Tacoma (SEA) - 5.5 mi away @ 41900 ft, heading WNW at 466 mph. Spotted 12x before. [11:57:57 AM CDT] #ACB824 #N919AK #B39M #ALASKA #ASA9451 #AS9451 #ADSB #ADSBbot