I like it. Is this going to be a book where the chapters are all only a page or two? If not, you should probably lengthen it or instead make it a short story with breaks in it.
I don't know exactly what you plan to have happen in the story, though, so what i have to say may be irrelevant, and I also don't want to force my ideas on your story.
First, why don't you mention his name? Or is that a part of him that had to die so he could survive? If you plan on having a scene that goes back to his family it would provide interesting contrast if they use his name a lot while for following the protagonist you keep silent on his name.
I think you should include more detail as to how he survived but you might be assuming he was just lucky when the plane exploded or are planning a flashback.
Most people have trouble doing anything at all when they're ribs are shattered and their arms are broken, let alone walk out into the jungle alone.
The forest seemed like home.
I think "welcoming" better conveys the idea.
Great first chapter though. How much research have you done though? Have you read "The Hatchet" or "My Side of the Mountain" and have you studied the Amazon Rainforest and it plants, animals, and the ways of it's people? I can't wait to see subsequent chapters.