As noted on Wikipedia:Votes for deletion/Helicopter use in Brasil, the newspaper article which has been cited as the source of this claim doesn't actually support it, and probably isn't a very good source to cite anyway. So I'd recommend removing this claim unless there is better verification available. Otherwise we will find ourselves cited as the source and it will become an urban legend. 

If you want to preserve the claim and encourage other editors to work on it, put it in the talk page (here), or just link to it in the article's history from the talk page. Then, if it can be verified, that's the time to put it into the article.