That's not how and EFB (electronic flight bag ) works. The iPad doesn't just have electronic versions of a few manuals. In order to "keep a copy at the gate", they would need a different "copy of the manual" at the gate for each individual flight. Not realistic, that is why the pilot has the info in his flight bag for that day. When the EFB goes down, there is no quick workaround.
4/29/15 at 8:56am