> I can’t help but be very nervous about the fact that we are still unclear on what exactly happened.
It seems pretty clear from their initial report (which largely corroborates the whistleblower a few months ago), no?
The bolts were not reinstalled after they were removed to perform a QA fix.
If you mean beyond that, why weren't the bolts reinstalled, nothing too shocking there. The system of record between Boeing and their subcontractors, as well as their procedures to pass off work between companies and crews, is not sufficient to prevent lapses in workmanship like this.
The good news is, all of these door plug bolts are confirmed to be properly installed ;) They just grounded them all to do that. Now...what _other_ bolts are missing, well that's anybody's guess.