Crashed Lion Air Plane's Black Box Found

Indonesian divers have retrieved a black box from a Lion Air jet that crashed into the sea this week with 189 aboard and brought it back to a ship on the surface, one of the divers has told media.

The black box could provide clues to what happened after the still-new plane lost contact with ground staff just 13 minutes after taking off early on Monday from Jakarta, on its way to the tin-mining town of Pangkal Pinang.

There were no survivors.

Indonesian rescue team operate during the recovery mission for the crashed Lion Air flight JT-610 plane at Tanjung Pakis Sea, West Java, Indonesia, 31 October 2018. (Image: AAP)

"We dug and we got the black box," from among debris in the mud on the sea floor, the diver, identified as Hendra, told broadcaster Metro TV on board a search vessel, the Baruna Jaya.

It was orange in colour and intact, he said, without saying whether it was the flight data recorder or the cockpit voice recorder, which are both usually referred to as black boxes.

The Lion Air flight crashed into the sea just 13 minutes after take off.

Only "small pieces" of the aircraft had been found, the diver said, adding that the search had gradually closed in on the black box.

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Yusuf Latif, a spokesman for Indonesia's search and rescue agency, stopped short of confirming that a black box had been found, but confirmed the finding of "an orange object".

The plane's black boxes should help explain why the almost-new Boeing 737 MAX 8 jet went down in waters about 35 metres deep just off Jakarta, the capital.

An investigator, right, examines parts of Lion Air Flight 610 retrieved from the waters off Tanjung Priok in Jakarta, Indonesia, Wednesday, Oct. 31, 2018. (Image: AAP)

A "ping" sound believed to be emitted by one of the black boxes had been getting clearer, Haryo Satmiko, deputy chief of the national transport safety panel, told Reuters earlier on Thursday.

An underwater drone had detected an object suspected to be part of the fuselage, he added.

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A team of divers had gone down since early morning to map the area where the black box is thought to be, Haryo said, describing sea conditions as normal.

Strong currents on Tuesday hampered the search, with the effort further complicated by the presence of energy pipelines nearby.

However, officials said they were confident they were searching in the right area, having found items, such as life jackets, trousers and magazines, thought to be from the plane.

If found, the fuselage would be lifted using a crane, because of the many bodies likely to be trapped inside, Muhammad Syaugi, the chief of Indonesia's search and rescue agency, said.