What caused 2009 Brazil-France crash in Atlantic?

A report said pilot error combined with defective sensors led to an Air France passenger plane crash in the Atlantic Ocean in 2009.

Autonomous Underwater Vehicles may soon find wreckage of Air France Flight 447

New hope has emerged for the retrieval of the wreckage of Air France Flight 447, with a survey employing the use of three Autonomous Underwater Vehicles (AUVs) called REMUS 6000 to find the debris.