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Data recorder reveals new information about EgyptAir Flight 804 crash

CAIRO -- Wreckage from the EgyptAir flight that crashed in May shows "signs of damage because of high temperature" and that a flight data recorder indicates there was smoke on board, a U.S. intel source confirms to CBS News.

The flight from Paris to Cairo crashed into the Mediterranean on May 19 for reasons that remain unknown. The pilots made no distress call, and no militant group has claimed to have brought down the plane.

Second EgyptAir "black box" found 00:28

The Egyptian investigating committee said in a statement Wednesday that a recovered flight data recorder, one of the plane's black boxes, showed that there was smoke in the lavatory and onboard equipment.

The second black box, a cockpit recorder, was damaged in the crash and is being repaired in Paris. The wreckage was recovered from the Mediterranean Sea floor earlier this month.

The Paris prosecutor's office announced Tuesday that they opened a manslaughter inquiry into the crash that killed 66 people, saying there is no evidence so far to link it to terrorism.

Prosecutor's office spokesman Agnes Thibault-Lecuivre said the inquiry was launched Monday as an accident investigation, not a terrorism investigation. She said authorities are "not at all" favoring the theory that the plane was brought down deliberately.

The decision to open the investigation was based on evidence gathered so far, she said, without elaborating.

EgyptAir voice recorder has been found 03:21

Egyptian officials had, however, suggested the most likely cause of the crash was terrorism, before backing off those remarks and saying no theories had emerged.

An Egyptian official at the ministry of civil aviation said Egyptian authorities haven't been notified of the French prosecutor's decision and that all scenarios remain on the table.

"There is no evidence that backs up or rules out any of the possible scenarios of what caused the crash, including whether it is a terrorist act or technical problems," he said.

The Egyptian investigation committee is in charge of issuing a final report, but France can also investigate because the plane was manufactured by France-based Airbus and French citizens were among those killed.

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