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.
The search zone for the crashed EgyptAir plane has been narrowed to 2 km (1.24 miles) from 5 km after a signal from one of the black boxes was picked up, an Egyptian source on the investigation has revealed.
It is hoped retrieving the flight data recorders will explain why the Airbus A320 plummeted into the Mediterranean en route from Paris to Cairo last month, killing all 66 people on board.
The source denied French media reports the aircraft had sent a series of warnings during earlier flights in the 24 hours before it disappeared off radar screens and crashed.
Transport Minister Alain Vidalies said it would be about eight days before the black box of flight MS804 would be recovered from the seabed.
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.