Helicopter crash sites seem to be seriously bugged in 0.55, both before and after the return the legacy loot system. First I found that one crash site has a 100% chance to spawn a crashed helicopter. This was the site directly to the southwest of the Military base near Vybor. This was tested in over 30 different public hive servers. However there was absolutely no loot inside ~95% of the time. Later, I found that the same was true of the crash site directly north of Stary Sobor (tested on ~10 servers and found no loot at all). So, my theory is as follows. I think that the locations at which helicopter crashes spawn are bugged such that the actual model of the helicopter always spawns in the same place, but the loot is distributed as if the helicopters are spawning in random locations as they are supposed to. So there will usually be nothing at the crashes, but there will be a pile of loot in the middle of a field. Of course I can't verify that theory, it just seems to be the most sensible theory.