I think from the point of view of Boeing, the FAA and the airlines, "put it in our maintenance checklist to reboot every 51 days" is a fix.

With that framing, this sounds like one of the easiest maintenance tasks imaginable. No wrenches or grease involved.

> I don't think airplane software ships updates the way npm packages do.

I'd ideally like to sleep tonight, thanks.

They do get software updates. Watch "Stig Aviation" "Stig Shift" series on youtube. He's shown how to do updates in a few of his videos.