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The National Transportation Safety Board (KNKT) will release its preliminary report on the investigation in the Sriwijaya Air SJ 182 flight crash next month, or 30 days following the incident.

"We hope that in 30 days after the crash, we would be able to deliver a preliminary report, and once it is published, we will show it to the public," Head of the KNKT Aviation Safety Investigation Sub Committee, Nurcahyo Utomo, noted in a statement in Jakarta, Tuesday. On Sunday (Jan 18), Utomo spoke of his side having conducted an investigation with a team from the US comprising 11 people, with four from the US National Transportation Safety Board (NTSB), four from Boeing, two from the Federal Aviation Administration (FAA), and an airplane engineer from General Electric.

"This is in accordance with ICAO Annex 13 where the country that makes aircraft designs has the right to participate in the investigation. This time, two investigators from TSIB Singapore are participating in the investigation in accordance with the cooperation of ASEAN countries," he stated.

Utomo noted that the KNKT had also downloaded all data from the Flight Data Recorder (FDR), or the black box.

"In accordance with what was earlier stated, we have also downloaded the FDR data, and we can say that we retrieved the data. It has been downloaded successfully, with a total of 370 parameters, 27 hours, or 18 flights, including the ill-fated flight," he stated.

However, Utomo stated that the data will continue to be explored again, and until now, it is not available to be shared or published.

"However, from the data obtained, there are some leads that we can explore further for the data we require for investigative purposes, and we also really hope that the CVR would be found to support the data we obtained from the FDR," he remarked.

The FDR black box was found on January 12, 2021, three days after the accident.

The KNKT had earlier also announced that the Sriwijaya Air SJ 182 aircraft system was still functioning and able to transmit data before it crashed into the waters of Kepulauan Seribu on Monday, January 9, at 2:40 p.m. local time.

The KNKT has collected the ADS-B radar data from the Indonesian Aviation Navigation Service Provider Corporation (Airnav Indonesia).

The data indicated that the plane was airborne at 2:36 p.m. local time, flew towards the Northwest, and at 2:40 p.m. local time, reached an altitude of 10,900 feet. The plane then reportedly began descending, and latest data on the aircraft indicated that it was flying at an altitude of 250 feet.

According to other data obtained by the KNKT from KRI Rigel, the debris, or wreckage, is spread over an area sized 100 meters wide and 300-400 meters long. (Antaranews)