After one year on the B-777, I know far less about this airplane than I knew about any other type after the same amount of time. Deeper information than that available in the Boeing manual appears to be unavailable. All the mx manuals are digitized and, so far, unavailable to me. The schoolhouse mantra is, "You don't need to know that." When I call my company's tech services personnel with questions, they usually don't know the answer, and either look it up (which is fine), or make-up something that is utterly false.
I've found that the best source of in-depth information is our line mechanics in London, who share our desire for depth, and enjoy discussing airplanes with pilots.
I find all this very frustrating. My visit to PPRuNe today was specifically to find sources of additional 777 information.
Anyone?