What was that plane?
 

Flew into SAT on Monday morning, and noticed an odd looking plane parked out on the tarmac.

It was a 747, painted completely white, with no airline or other identifying marks at all. Looked very odd. Plus, I can't imagine San Antonio sees many 747's.

When I flew home Wednesday, it hadn't moved.

If it really has no identifying marks (ie no registration) then it must be in for repainting. Alternatively there are several 747s operated by various worldwide charter companies in all white liveries, but they have registrations.

If you know the difference between the various types of 747 can you give a bit more detail ? Standard length or the short 747SP version (there are a couple of all white exec versions of this about). How many windows on the upper deck ?

I dunno, maybe it was this one?

Maybe Cargo?
 

The 747-200 is very popular for cargo, or as suggested it could be in for painting.

Yup, that looks like it. Thanks.

"Boeing 747" painted in small letters in red, otherwise, no markings that I could see.

SAT is a mini boneyard of sorts, thanks to the good weather. We currently have an ex-Iberia DC-10, several ex-United 737s, and a handful of other aircraft. We even have a BAC-111, which I believe is used for law enforcement training purposes.

Dee Howard has a huge facility for aircraft maintenance and painting. It is not suprising to see multiple heavies from all corners of the world on site. For example, in recent times I have seen a Saudi Arabian MD-11, a bunch of UPS widebodies, a Polar Air 747, and the white 747 of which you speak.