Airbubba, you pointed out that the NTSB document was
labeled as an 'Aircraft Accident Investigative Update'.
and indeed it is so titled. I seem to have seen various versions of it, with minor differences, such as having page numbers or not. That sort of thing is minor, but it makes you wonder whether you're looking at the same document.
But the thing that puzzles me about it is that it has no date on it, no reference number to identify it, and no signature or other indication of who wrote it. It's been described as a 'preliminary report' - but it doesn't seem to be the kind of formal preliminary report that accident investigation bodies usually publish within a month or so. Which is presumably why NTSB describes it as an investigative update.
Does this matter? I don't know - but I do know that I'd rather like my official documents to have some indication on them of when they were written and some way of identifying them.
airsound