How to get into...

The Blu spawn on Stage 1 of Dustbowl.

http://www.youtube.com/watch?v=4x5E0-xoe8Y

Did this just today.
... I'm confused. Don't you need an engineer on the BLU team to do this?

Quote (Ted)

... I'm confused. Don't you need an engineer on the BLU team to do this?

Yes. You need a Blu engineer for a lot of things, my friend.