HX Models 1:400 Boeing 747-8F N747EX Model1: 400 Diecast: Boeing 747 8F House Colors N747EX "Experimental" (HX Models B631004) N747EX, MSN 35808, is the Boeing 747 8F prototype. It lifted off from Paine Field, Everett, at 12: 39 PST on 8 February 2010 the type's first flight. The aircraft carried Boeing's standard house colours throughout the flight test programme before being converted for delivery to launch customers. N747EX represents the most significant early variant of the 747 8