Back in 2014[1] Al Jazeera (the international edition) had a pretty good in-depth report of issues with the manufacturing line for the 787.

There are known issues regarding quality assurance at Boeing for a decade now, they keep going down the drain. The MBAs from McDonnell-Douglas won, and properly tarnished Boeing's image...

[1] https://www.aljazeera.com/program/investigations/2014/7/20/t...