takata
I think we may be jumping to a conclusion or two. I don't see conclusive evidence that she "stayed clean all the way down." The BEA say she was intact at impact, fine. Intact does not mean clean at impact, neither does it mean she was not using control surfaces on her way down. BEA have said Flaps were stowed, fine. Stoweds flaps likely means retained spoilers, but does not preclude their deployment. All of the surface recovered pieces have yet to be conclusively demonstrated to have been on the a/c at impact. Please don't extrapolate from that, it is merely a statement of fact.
Still, "Clean at impact"? "Clean all the way down"? If speed is a problem, dirty is good?
wozzo
BEA is not the only authority responsible for conclusions. If the data is disclosed, "duty" can be assumed by any independent. You are confusing duty with ownership. The findings, though ennabled by BEA, are not the property of BEA. Likewise, "proprietary" or "Patent" considerations are secondary to Public good, would you not agree? National security perhaps, but what about Public carriage has to do with espionage?