The Air Force is aiming to save at least $5.7 million in fuel costs alone, which is “well over $50 million,” according to the major. But the cost saving isn’t everything. Being able to quickly pull up “engine fire” through a simple PDF search is far easier — and less stressful — than flicking through tens of thousands of pages of text. It also might save the U.S. taxpayer even more money in the long run by not crashing the $168 million mega-plane into a mountain or a Taliban stronghold.

The iPad’s become a popular replacement for cockpit manuals for commercial pilots, too.