It's one thing to hire some little guy consultant - whoever pays the piper picks the tune.
It would be a major disaster for DL to issue a whitewash report like some here are implying, and if another AF crash happens - then what? A lot of AF flights are code shared with DL, and lawyers would rip DL to shreds - and they'd be right. The Arthur Andersen scenario is pertinent. It used to be a $9bln company. It's gone.