REPUBLIKA.CO.ID, JAKARTA -- The National Transportation Safety Commission (KNKT) has downloaded data from the flight data recorder (FDR) and cockpit voice recorder (CVR) of AirAsia flight QZ8501.

"The data from the FDR has been downloaded, the quality is good, the data download from the CVR has just been completed," Air Transport Accident Investigation Head Masruri stated here on Wednesday (14/1).

After downloading the data, he noted that the KNKT will make a transcript of each flight data recorder.

"We need longer time to make the transcript. The transcript should be read carefully," he noted.

He pointed out that the KNKT could not determine the time period it will take to make the report from the data collected from the two devices in the black box of the plane that crashed on December 28, 2014.

Earlier, the CVR of the doomed AirAsia QZ8501 was retrieved, Transportation Minister Ignasius Jonan stated here on Tuesday.

It is yet to be confirmed by the KNKT whether the retrieved CVR belonged to the AirAsia QZ8501 aircraft.

"Therefore, it would be brought here to have its serial number checked," the minister remarked before leaving the Iskandar Air Force Base and heading to Panglima Utar seaport in Pangkalan Bun, Central Kalimantan.

He noted that the CVR had been retrieved from the seabed, but it did not automatically mean that it belonged to the AirAsia QZ8501 aircraft as its "DNA" had yet be identified.

Moreover, the Indonesian navy divers were able to retrieve the FDR of AirAsia QZ8501 aircraft that stores information about the flight.

The device has already been sent to the office of KNKT for analysis.

KNKT Chief Tatang Kurniadi revealed that it would take a significant amount of time to read and analyze the data from the black box to unearth the cause of the AirAsia QZ8501 crash.

He said it would take only two or three days to download the contents of the FDR, but a lot of time would be needed to read the data. Moreover, the analysis of the data must also be carried out in the presence of investigators from several countries linked to the plane and victims. The investigators are yet to arrive.

The FDR will be opened in Jakarta if the witnesses are ready, including accredited representatives from Airbus, Singapore, and other countries that are linked to the plane and victims, he affirmed.

"It is also possible that the representatives from the TNI (military) Headquarters and the ministry of transportation may be invited to ensure that the device is really opened here and whether or not the result is good. It will be checked together," he stated.

He noted that the FDR had been received in good condition, but the results of the contained data will be determined by the information stored in the device while reiterating that the black box will be opened in Indonesia.

Tatang earlier noted that four countries were involved in the search and investigation of the black box, including the countries where the plane was designed and manufactured as well as where the jet crashed and the countries to which the victims belonged.

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