Back in the 70s, Russian passenger planes were nothing but converted WWII cargo planes with seats. Not a single bolt or screw or rivet had been tightened since the war.
The runways hadn't been maintained since the war, either. Trees and bushes would be growing out of the pot holes and cracks. Whenever a plane crashed and burned, they'd just shove it off the edge of the runway which gave a nice warm fuzzy feeling... NOT!