https://boeing-test-flights.blogspot.com/2016/05/n8685b-b737-8h4-southwest-flown-from.html
Puget Sound - Boeing Test Flights: N8685B B737-8H4 Southwest Flown from Everett, WA to Phoenix, AZ
L/N 5888 C/N 36723 B737-8H4 N8685B SOUTHWEST Dep PAE 17:40 PDT Arr PHX 20:05 MST Call Sign SWA8700 Hex Code ABEF98