I have a test coming up today and I've got the material down, so I'm just kind of hanging out helping my neighbors when they get stuck. I started him at the hardest page and we worked through it so I could show how the trick if understanding the engineering stuff is knowing what info is found in which documents, and navigating from a blueprint, to a data list, to a part list, to the blueprint, and keeping notes for the relevant stuff.
It's not so bad once you get the flow. big aerospace company has a relatively easy to use database. The real difficult part is navigating giant busy schematic drawings one section at a time on a slow fucking computer with a small monitor.