Just to add to Rigga’s story, I did one of the shifts at the controls during the 8 hours of ground running while the engineers came up with the solution.
Seem to remember one of the problems was getting advice from Boeing in the States due to the time zone difference - a number of them had to be woken!
I wasn’t part of the shutdown crew and recalling that on that very same dispersal several years earlier a Wessex thrashed itself to pieces during a ground resonance incident (cars damaged hundreds of metres away) - I watched this shutdown from a safe distance!
Engineers did a great job with minimal damage compared to the Canadian incident – can’t believe they didn’t have rotor brakes fitted though.