South - SQ 777 at DFW Terminal A

I had a flight out of DFW earlier and noticed a SQ 777 parked at DFW. Tried to ask some agents but no one seemed to know what it is doing here other than mysterious mechanical/emergency. Does any of our experts have any real information?

Wirelessly posted (SAMSUNG-SGH-I607/UCHA1 (compatible; MSIE 6.0; Windows CE; IEMobile 6.12) UP.Link/6.3.1.17.0)

SQ cargo stops at DFW about once a week. Could it have been a cargo flight?

Thanks wwta.
It very well could be, it looked like a 777 to me from a little bit away. No one at the Terminals A or B seemed to know what it was doing there. I was very happy to see the SQ bird at DFW, but I guess I am not playing to lottery today :)