During my time on the Vickers Funbus as a GE the systems knowledge of the crew was almost a must. You can't be an expert on everything and, since they use the systems all the time, their knowledge was invaluable in getting the old girl up and running again.
I spent a fair bit of time with my crews getting to know their perspective and they, mine. Many an engineer, (bless their cotton socks), has given me a hand with downroute snags. You can never know too much.
Oh! And I can land a 10 in the sim
