"No evidence or indications of manipulation of the recorder was found," the Dutch Safety Board (OVV) said in a statement.
"The data was successfully downloaded and the flight data recorder contained valid data of the flight," it said.
The OVV yesterday said that it had successfully downloaded recordings from the black box cockpit voice recorder.
The recorders, salvaged from the plane wreckage in eastern Ukraine, are being analysed at the Air Accidents Investigation Branch headquarters in Farnborough, southwest of London.
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The boxes -- which are actually orange in colour -- were delivered to Farnborough by the OVV, which is leading an international investigation into the crash in which 298 people died, 193 of them Dutch.
The OVV is coordinating investigation teams from eight different countries, including Russia.
Pro-Russian rebels controlling the crash site handed the boxes over to Malaysian officials on Tuesday, following an international outcry over the treatment of the wreckage and the bodies of the victims.