Thanks very much PJ2 for the reading suggestions.
Recalling the 787 grounding, at the time it was occuring, I observed what appeared to be a divergence in the investigative processes conducted in the U.S. relating to the incident in Boston, when compared to the essentially same type of process conducted relating to the incident in Japan (or at least these appeared divergent on some superficial level). It wasn't just the practically contemporaneous postings by NTSB of inquiry documents on its website (for instance witness interview reports were posted promptly there). Without meaning or wanting to knock Japanese process in that incident, it seemed the U.S. Board was more comprehensive, and was digging deeper.
So another question for "the authorities" in this grounding situation (and crisis) is, was such a divergence, if it did exist to a material extent, a precursor for Annex 13 headaches when the current report by Indonesia's authorities will be contrasted with, eventually, the report by Ethiopia? As even casual observers have seen, press reports have questioned integrity factors around the Ethiopia investigation.
Trying to shed any taste for drifting a thread, I'm not cataloguing the list of "responsive action decision and implementation steps" now in sight (not cataloguing them here). Just to add, the fact that another retired highly ranked Navy admiral, a former Vice Chairman of the JCS, already has been directing the new Safety Committee, gives, or should perhaps give, some modest measure of optimistic view.