I’d be interested to know of the QA plan, most obviously failure modes, and how it was executed and signed off.
Unfortunately- Boeing will most likely keep it proprietary such that perhaps- maybe- it will be an exhibit in one or more of the coming- existing lawsuits- even then it may well be supplied under a protective order and available in context only to the jury IF pressed. Otherwise a summary of standard procedure of xyz group checked by abc group and signed off by ccc senior manager. Ditto for FAA and other agencies. And having been determined to meet section - 75635-cvr-67.1834 of code fubar321.45 as amended was within the rules ..
The noise you hear is A** covers slamming closed...