That attempt repair didn't last long. Internet research for a manual reveals the thing, an AR Drone 2, is operated via a smartphone app. This Luddite has no such phone. So it was back in the box, where it was for the previous six weeks. The owner made the fatal mistake of saying, "There's absolutely no hurry for it." - hence it had been forgotten about within minutes.

(Note: there were no signs of salt water damage, nor claims of it being found on a West coast beach somewhere...)