If you are participating in attack heli, afterwards go to downed site & present your claim. There may be some arguments but mostly everyone is agreeable. In my past experience, we'd take 1 to 2 crates, depending on the damage. Damage can be found by checking the combat log by hitting f1, type combatlog. Combatlog will show time, attacker id, target id, weapon, ammo, area, distance, old hp, new hp, hits, to give you idea of how much damage you've done to the attack helicopter. Hope everyone stays to see the changes aren't so bad.