Stalker: Call of Pripyat → Skat-5
One of the first story quests. It's simple: we need to reach the helicopter located inside the "Swamp" anomaly and search it. I don't think anyone will have any particular difficulties. The anomaly is easily accessible, just don't run into any hungry dogs or anything else. After searching the helicopter, we discover that all the electronics inside have burned out, and now we need to find the cause of the burned-out electronics. We'll find the cause by completing another quest, so that's all for now. Now, the Skat-2 and the area maps.
Tips: Use the bolt in the anomaly to pave the way. You'll find some provisions in a crate near the helicopter.
Source: stopgame.ru
See also:
Stalker: Call of Pripyat - Stimulants
Stalker: Call of Pripyat - Food and Drinks
Stalker: Call of Pripyat - Helmets (guide)