It said the "crash-survivable memory unit" was opened and washed and some of its wiring will need to be replaced and a new shell provided from Lion Air to enable a download of data. In the context of Indonesia's patchy aviation safety record, however, lawmakers have started to call for a tightening of standards and a government-led audit of the country's airlines.
Its transport safety panel investigated 137 serious aviation incidents from 2012 to 2017.
The commander of the Indonesian navy's SAR division Colonel Isswanto explained, as reported by NST, that decompression issues might be the cause of death. "Passengers' safety must be made a priority".
The agency is prioritising recovering human remains and the cockpit voice recorder (CVR), the second black box from the wrecked near-new Boeing Co. The ocean depth in the area of the crash is about 35 metres (115 feet), and strong currents and waves are making searches hard, he said.
A ping detector was used by the search team to locate signals from the black box, along with a remotely operated underwater vehicle (ROV).
Investigators have succeeded in retrieving hours of data from a crashed Lion Air jet's flight recorder as Indonesian authorities extended the search at sea for victims and debris.
He stressed the airline would not allow it to fly should the problem still exists with the plane.
Members of the National Transportation Safety Committee (KNKT) collect debris of the crashed Lion Air JT 610 at Tanjung Priok port, Jakarta, Indonesia, Nov. 2, 2018. "Now, we are searching at the right spot".
Avi Riyanto, director of airworthiness at the transport ministry, said it is closely monitoring flights of other Boeing 737 MAX planes in Indonesia.
A forensic investigator collects samples of recovered belongings believed to be from the crashed Lion Air flight JT610. It has been damaged and requires special handling, they say. The manufacturer provides tools to obtain the data after an accident, he said.
Muddy waters and fast currents have impeded recovery efforts since the plane crashed Monday.
"That was a pretty hard hit", he said.
Indonesian airlines were banned from flying to the United States in 2007 because they were "deficient in one or more areas, such as technical expertise, trained personnel, record-keeping, or inspection procedures", the Federal Aviation Administration said.
The accident resurrected concerns about Indonesia's poor air safety record which until recently saw its carriers facing years-long bans from entering European Union and United States airspace.