This afternoon, I saw an A340-600 in Airbus livery (-600) and the RR engines. I'm sure it wasn't an A340-200 or -300. It was parked at the international terminal with a jetway connected and next to a NW 747. Lufthansa Skychefs had a truck connected and the cargo hatch was open.

Which airline flies it? More likely, was it either a sales flight or a compatibility with the gate type flight?