I guess there's nothing in the airplane manual about this situation, so Chance unstraps himself and heads back into the passenger area. Oh, and in about ten minutes, they'll fly into a storm cloud and be ripped apart. The pilot has an oxygen mask and is able to give some useful advice. Apparently the flight computer couldn't process what was happening (Winston: "I know how it feels!") and shut down. And you can't roll the plane over without the flight computer. Winston suggests rebooting it, and Chance says "it's a flight computer, not a laptop!" So Casper comes over to babble about megahertz and how her laptop could replace the flight computer. After all, the original moon landing was done with a laughably small computer by modern standards (True, by the way). But first she has to get the Flight Computer software, so she accesses the manufacturer's internal network. From a laptop on an airplane with no radio antenna. I shall assume that she's got mobile DSL and that you can use that on an airplane. Sure. So her laptop screen gets filled with stuff and she downloads the software. Note that at some point, they could probably notify the authorities, FAA, TSA, Boeing (or whoever made this particular plan), or Steven Seagal and get some outside help. The "skeleton key" sort of comes into play, as she attaches a thumbdrive to her USB port.
Okay, it's been five minutes so it must be time for a new absurd objection. They have to attach the computer manually, which means they have to get to the avionics bay behind the front wheel well. The pilot explains that it's the sort of thing you're supposed to do while the plane is on the ground. Luckily, Laura knows about a secret vent that's not on the schematics! Winston is dubious, as usual. Laura claims that she "used to date a ground crew guy". So now Chance and Laura have to put on lots of extra clothes because they'll be outside the pressurized cabin. Yeah, you want to wear a sweater in that situation.