Been 'instument scavenged' for some time and likely some of the fuel and oil was too hence removed cowling (but why so far away - scavengers? squatting/toilet wind-break? grave marker? windblown?) and maybe the lack of fabric except for a small tuft between the trim tab and rudder (a long stretch of an hypothesis I grant you) was possible by the remaing crew for heating /or cooking with while awaiing rescue - likely too the canvas seats.
So say, most likely within 12km somewhere are the lost remiains of the 'help expedition'.
I hope they are found assuming wildlife (animal or human) or the enviroment haven't at some point knawed upon, spread them apart or disintergrated them - although unfortunately I doubt many would bother to look - unless 'state' sponsored.
Mind due though, with the radio/nav man in that expedition, they likely wnet towards nearest village, huts, military place or steppe herders etc which they might have flown over before the crash... but lost in Wintery Sibiria, likely suffering with white out too, at some point they c/w-ould've gone in circles til clustering for rest and warmth...