There used to be a link to the SA CAA report on the Thunder City crash on the Airmech website but it's no longer working.
It made pretty horrific reading.There was a fire in the lower aft fuselage which disabled the hydraulics & after finding himself unable to lower the gear when the pilot eventually tried to eject he couldn't.There were a number of findings,including the pilot using reheat momentarily after landing,I guess to impress the spectators and the canopy & seats being removed/refitted without the required checks afterwards.