Aeroflot Flight 6551
Aeroflot Flight 6551 ( "Reys 6551 Aeroflota" ) was a scheduled domestic passenger flight on an Ilyushin Il-18B from Baku to Novosibirsk with a stopover in Tashkent that crashed on 11 May 1973 over Semipalatinsk in the Kazakh SSR , killing all 63 people aboard . 
<triplet> Aeroflot Flight 6551 <subj> 11 May 1973 <obj> point in time <subj> 63 <obj> number of deaths