🇺🇸 N921UP - BOEING 767-300F - BOEING CO UPS974/5X974, Louisville Muhammad Ali (SDF) to Portland (PDX) - 5.1 mi away @ 37975 ft, heading W at 514 mph. Spotted for first time! [03:20:20 AM CDT] #ACC3B1 #N921UP #B763 #UPS974 #5X974 #ADSB #ADSBbot