Investigators say they still haven't found the plane's black box flight recorders and it's unclear whether they are still attached to the fuselage.
All 228 people aboard the plane were killed when the flight, en route from Rio de Janeiro to Paris, slammed into the ocean June 1, 2009, after running into an intense high-altitude thunderstorm. The cause of the crash remains unclear.
The head of France's air accident investigation agency, Jean-Paul Troadec, told reporters Monday that he's confident that engineers can still read the data and recordings in the black boxes - if they weren't damaged in the crash.
