Thank you, TCoB. You come across (rightly or wrongly) on this forum, as one who does not tolerate any leeway with the crew (and yourself, I presume), with statements such as, "although any crew doing what they did now would certainly have some explaining to do." and, "That doesn't excuse them though.".
I wonder if this is how junior crew members would also see you, and whether it would affect their readiness to speak up, IF you were ever "guilty" of making a mistake? I`m sure your reply would be that you would EXPECT them to, and that you would chastise them if YOU subsequently discovered it yourself.
And so once again, we head down the CRM path.]
Personally I am not as interested in knowing WHAT mistake(s) was made, but WHY, and why it wasn`t caught in the airline`s Safety Net, because if it`s capable of happening once, it can recur countless times.
Just saying that ALL 3 crew members missed it, and that they should be hung high, is not - for me - any sort of answer.