On the topic of flight engineers, there is a website I can highly recommend. It contains an absolute mine of information about a career as a flight engineer, including a
virtual book written by a former flight engineer uploaded to the site in the form of 9 huge PDF documents covering what would be nine substantial chapters if it was ever to be published in print form.
The website is called “AIR NEW ZEALAND's FLIGHT ENGINEERS” and you can access it at....
http://flight-engineers-air-nz.********.co.nz/
In the pages index, scroll down to “A DIRECT LINK TO GARY SOMMERVILLE'S ARTICLES” and click on the link. The nine PDF documents cover Gary's early career as a licensed aircraft engineer, obtaining a job with TEAL (Tasman Empire Airways Ltd.), becoming a flight engineer on Lockheed L.188 Electras, then his time as a flight engineer on DC-8-52, DC-10-30 and Boeing 747-219 jetliners with Air New Zealand (formerly TEAL).
However, be advised that the site appears to have limited bandwidth per month, so if you all try and download those PDF documents (all nine of them) at the same time, you will run into a wall. It's a case of first in, first served, but if you cannot get access to them now due to a rush, you need patience and you will eventually manage to download the documents, which are lavishly illustrated.