augustusjeremy;
Yes, I think the TSM would help. Again, hopefully investigators are now far ahead of anyone here in terms of thinking/assessing/postulating/investigating. I'm sure in a few cases this site has provided some insight for the process but this is what they do and there are people who know the nuts-and-bolts of the 330 far better.
Re,
Not sure what you mean by this but if you are referring to reversed cannon plugs for warning systems, yes, I know that has occurred, although I don't know where - manufacturing or regular heavy maintenance. It is not appropriate to provide details here but it would have resulted in an emergency if I'd followed the ECAM without thinking first.