Sure is deep but recover is possible. 40+ years ago we raised a portion of Soviet sub that sank in 16,000 feet of water. http://en.wikipedia.org/wiki/Soviet_submarine_K-129_(1960)They are now reporting that the pinger detection is at 14,800 feet deep (2.8 miles)!!!
The Titanic was found at 12,500 feet, so if this is the plane it's incredibly deep.