This used to be possible on DB by using the proper object relative rotations
You zeroed the object rotation first then used ( in your requirement)
turn ( for y axis first)
roll ( z axis)
then pitch ( x axis)
though i have to say it's a fairly odd order to require!
However DBPro won't do this since the free flight commands are no longer relative to the objects axis.
istead ... assuming it stays that way, you should try the new version of the free flight commands .
they act is if you did a y rotate first, then pitched up and down relative TO THE WORLD ( x rotated) and then rolled in a free OBJECT RELATED axis z rotate.
At least on the demo i just tried.
Bit of a disaster for my own programming which will have to permanently return to old DB 1.08!! but the new order may suit many people.
good luck.