Basil.
Sorry I must have misread JEP's post. I thought he was after info on B767 and A310's. As the Airbus experience I have is A300, not A310, I opted to mention my experience with the B762. I could have offered info on many other types/models and how the systems work. Some are getting a bit hazy though.
Remember the bunk in crew rest (next to the unheated cargo door) on a B707 when it was cold soaked? That was COLD!
Like you I was a FE before retirement caught up with me.
Cheers.