Thanks Safetypee, We have that very rig.
It was originally comissioned in 1990, and used to develop the Cat 3 autoland systems, then the EFIS and other upgrades for the RJ'X' program.
I have plenty of wiring diagrams and some engineering change notices, which are very useful but nothing in the way of operating manuals for the systems. I've contacted a few likely sources for help, but not heard anything back yet.
There are five switch panels fitted, which allow us to change all kinds of parameters. If only we knew what they all did!
I suspect it will be providing research opportunities for a few years to come...