CPFlifght FCU upgrade question

It says "disconnect external modules and expansion board if any".
Does this mean the left and right EFIS ?
Regards...........Brian W.

Just a guess, but I would say yes to that. I can't think what else it could mean.

Sean

Brian

I take this to mean disconnect everything attached to the MCP and then do the upgrdae. That's what I have done over the years without issues

Ralph