FILE -- This August 21, 2015 file photo shows an EgyptAir Airbus A320 with the registration SU-GCC taking off from Vienna International Airport, Austria. The cockpit voice recorder of the doomed EgyptAir plane that crashed last month killing all 66 people on board has been found and pulled out of the Mediterranean Sea, Egypt's investigation committee said on Thursday, June 16, 2016. (AP Photo/Thomas Ranner, File)
FILE -- This August 21, 2015 file photo shows an EgyptAir Airbus A320 with the registration SU-GCC taking off from Vienna International Airport, Austria. The cockpit voice recorder of the doomed EgyptAir plane that crashed last month killing all 66 people on board has been found and pulled out of the Mediterranean Sea, Egypt's investigation committee said on Thursday, June 16, 2016. (AP Photo/Thomas Ranner, File) Credit: ap — Thomas Ranner

Cairo — The voice and data recorders from the EgyptAir plane that crashed into the Mediterranean nearly a month ago are “extensively damaged” and will need repairs before they can be analyzed, an Egyptian official said Friday, dampening hopes for quick answers as to what caused the disaster.

The official didn’t elaborate on how long the repairs would take but said if this cannot be done in Egypt, the so-called “black boxes” would be sent abroad. The official who spoke on condition of anonymity because he wasn’t authorized to speak to the media.

With the flight’s wreckage 3,000 meters under water, the cockpit voice and flight data recorders are vital for piecing together the last moments of the flight, which plunged into the sea between the Greek island of Crete and the Egyptian port city of Alexandria on May 19, killing all 66 on board.

Earlier in the day, Egypt’s investigation commission said the flight data recorder had been pulled out of the sea, a day after the cockpit voice recorder also was recovered.

The memory units inside the recorders can provide key data, including the last conversations inside the cockpit, information about auto-pilot mode or even smoke alarms. They might also give answers to why the pilot made no distress call.

Experts say the data, combined with previously obtained satellite and radar images, debris analysis, the plane history and the pilots’ records, can shed light on the most possible scenarios.

The cause of the crash of the Airbus A320 has not been determined and no militant group has claimed bringing down the aircraft.

“We will be having a wealth of information that helps the investigators eliminate some possibilities while giving priority to others,” said Hani Galal, an Egyptian aviation expert.