Re Chaz: Pulkovo flight 612 stall. From FDR data; stall from 11,677m reached vertical velocity of 94m/s around 5730m, decreasing to 72m/sec just prior to impact. Time of decent was 126sec.
Re the engines. Unless I am very much mistaken, the LPC fan blades are gone, the front sections of the outer nozzle containment shroud ring has gone, and what we see in both pictures are the remnants of the guide vanes which form the rear part of the bypass nozzle. Surely, this level of destruction is suggestive of a high engine shaft rpm at impact.
Compare this with the crush damage sustained on engine 2 for TW 800 and the still intact nature of the LPC fan, where the NTSB concluded that there was minimal amount of low-pressure rotor rotation at impact.
General Electric cf6-80
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CROSS SECTION
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FLIGHT INTERNATIONAL: DETAILED SECTION
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REAR VIEW OF FAN SECTION
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TW800 ENGINE 2 - IMPACT CRUSH DAMAGE
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