Search teams have retrieved the cockpit voice and flight data recorders from the EgyptAir plane which crashed into the Mediterranean in May, killing all 66 on board.
It is hoped analysis of the black boxes will shed light on why the plane crashed en route from Paris to Alexandria.
At present no militant group has claimed responsibility for bringing down the aircraft.
Egyptian authorities have said they have retrieved the second flight recorder in the search for the crashed airliner, Flight MS804.
On Wednesday, search teams retrieved the cockpit voice recorder from the Mediterranean Sea.
Investigators will hope the breakthrough will explain what caused the plane to go down.
The Airbus A320 plunged into the sea en route from Paris to Cairo on May 19, killing all 66 people on board.
Work has begun on analysing data from the two black boxes from the fated EgyptAir flight that crashed into the sea in May.
French air accident investigators confirm the signal detected earlier is from a flight recorder.
The head of Egypt's forensics authority said it is 'too early' to know what caused the EgyptAir plane to crash into the Mediterranean sea.