[fcsp]

As things stand, it seems the anon insider report from 3 weeks back was legitimate and accurate, and holds answers to your question: https://leehamnews.com/2024/01/15/unplanned-removal-installa...

[koyote]

I read that but could not work out which of my two statements are true. Might just be bad reading comprehension on my side...

[fcsp]

From my understanding, both Boeing and Spirit have been employing very shoddy practices, but at that point in the production line it's Boeing who is responsible for QA