Far Cry 3 - Pinned to Earth

This mission starts from a NPC that is southwest from the AM 12 outpost. Nobody believes that she saw a burning plane crash land not too far from her position, so she wants you to go and see if anyone needs help. Go to the marker and use the Glider, making your way down to the beach below. Once you land on the beach, you'll find a plane that has been split in half. Look inside, then go to the next marker and speak to the man there. After some interesting developments, the mission will end (reward is $500).