I have two experiences involving this aircraft.
First: I had a chance to walk through the cabin of this aircraft while in maintenance in Phoenix. I remember there being a few passenger seats to be used by the engineers during takeoffs and landings. Also there were about four to six different stations inside that were used to perform tests. Interestingly, IIRC, there was no true lavatory on board the aircraft. Just a small port-a-potty at the most rearward section of the interior.
Second: While working on the ramp at Sky Harbor, I watched this aircraft abort a landing and go around just feet from the ground. Apparently the plane caught a stiff crosswind and drifted off center of the runway. So much so that when the engines reached full thrust, a huge cloud of dust was blown from the unpaved areas along the runway. It was a scary sight to see. Good job of the crew recovering from that situation.
Just thought I'd share that.
Al