So, your only actual question so far was if anybody tried feeding XML documents into an LLM. No I have not, and by the way, you are most likely violating your company's policies if you upload your official documents into any kind of online system (outside distribution and all of that)
That said, I'm with the others on this - if pilots are unable to find information by themselves, and instead have to resort to asking an intransparent AI for answers that may or may not be accurate, we're deeply in trouble.