A recording shows signs of heat and smoke on board the plane that crashed into the Mediterranean last month.
The repairs open the door to clues that may answer why the plane crashed into the Mediterranean.
The boxes will eventually be returned to Egypt for analysis that investigators hope will unravel the crash cause.
Six others given death penalty alongside the former president as Egypt continues crackdown on the Muslim Brotherhood.
One of the so-called black boxes was salvaged but in a damaged state.
Few predicted that stable autocratic governments around the Middle East and North Africa would have been toppled in a matter of months in 2011.
The flight was traveling from Cairo to Beijing when it had to divert due to security fears.
The search is a race against time, as black boxes stop emitting signals after one month.
A Kenyan diplomat accused her Egyptian counterpart of making the remark at a U.N. meeting in Nairobi.
Investigators continue to search for clues as to why the aircraft crashed in the Mediterranean Sea.
The suspension came after deadly clashes between authorities and civilians in 2013.
Even before the EgyptAir tragedy, the bombing of Metrojet Flight 9268 raised chilling doubts about the people who prepare commercial airliners for flight.
Egyptian forensics official says human remains so small "there isn't even a whole body part."
Egyptian official says the aircraft made no abrupt turns before disappearing from radars.
Hamad el Kaddah opens up about the loss of his friends and colleagues in last week's crash.
Authorities stress that no possibility is being ruled out as they probe what took down Paris-to-Cairo flight with 66 on board.
The search operation found personal belongings of passengers 180 miles off the Egyptian coast.
Ian Phillips is philosophical about his near miss and offers his sympathies to those who lost loved ones.
Air accident investigators say a malfunction on the Airbus aircraft is unlikely.
Authorities arrested Ezzedine Khaled for a video satirizing the sale of two islands to Saudi Arabia.