There were smoke alerts inside the cabin of the EgyptAir passenger plane before it crashed in the Mediterranean on Thursday, reports say.
Smoke was detected in the toilet and the aircraft’s electrics, just minutes before the signal was lost, according to data published on air industry website the Aviation Herald.
However, there has been no independent confirmation.
Flight MS804 was en route from Paris to Cairo with 66 people on board.
Greece says radar showed the Airbus A320 had made two sharp turns and dropped more than 25,000ft (7,620m) before plunging into the sea.
Debris and body parts were found on Friday by teams searching for the wreckage of the Airbus320, Greek and Egyptian officials said.
Items including seats and luggage have also been retrieved by Egyptian search crews.
The debris was discovered about 290km (180 miles) north of Alexandria, the Egyptian military said.
European Space Agency satellites spotted an oil slick in the area where the flight had vanished – but the organisation said there was no guarantee it was from the plane.
The search is now focused on finding the plane’s flight recorders, the Associated Press news agency reports.
Egyptian President Abdel Fattah al-Sisi has expressed his “utmost sadness and regret” at the crash.