A Nonny Mouse
<<I am sure I remember a B707 loosing a tailfin in severe turbulance over Mount Fuji in the 60s, killing all on board. Does this not count because it was not an Airbus?>>
I believe the tragedy you are referring to involved a B.O.A.C. B.707-436.
In that case it was very strongly suspected that severe turbulence caused a total break up of the aircraft. The mainplane failed at the centre section, but whether this was the first point of structural failure or not I cannot be certain.
Regards
Exeng