@ Kulverstukas
The Lauda Air crash (already mentioned by rog747) experienced structural failure after its gross upset, probably because airspeed far surpassed Vne in its dive. It broke up only seconds before reaching the ground. The uncommanded reverser deployment likely resulted from a control system failure, not a structural failure.
The BOAC Flight 911 crash, like mountain-turbulence accidents mentioned previously, initiated far below the regime of cruise altitudes (about 16,000 feet).