[ffgjgf1]

If they fulfilled the requirements provided to them I don’t see how that could be the case. Even if they didn’t it was Boeing’s job to verify that.

It’s a bit like blaming low level construction workers for a bridge that collapsed (assuming they didn’t sabotage anything on purpose).

[beeboobaa3]

You should always question if the requirements you get make sense.

[ffgjgf1]

And? How would that help if they have no clue about how that specific system was supposed to work?