Volume said
#183 (permalink)
Check out the Comet crash investigation of G-ALYP. If I remember correctly, at least one turbine separated from the shaft. It was confirmed by testing that this can be atributed to gyroscopic loads if the wing pitching moment turns the engines quickly nose-down when the tail is no longer preventing this.
That gyro loads can be very destructive ( reaction of a spinning disk at right angles to displacement ) was well documented in 1959-1960 re the Lockheed Electra crashes. In those cases, a weakened engine mount on the turboprop engine resulted in near total destruction of the wing and resultant crash(es)
Lessons Learned
IF the tail separated ( on the metrojet ) allowing a rapid pitch change then tearing of the pylons could be expected.