A top Indonesian military official says the Lion Air jet that crashed Monday may have been found in the Java Sea.
The Lion Air flight JT 610 flown by Indian captain Bhavye Suneja disappeared from the radars on Monday morning, 13 minutes after it took off from Jakarta towards Pangkal Pinang on the Indonesian island of Bangka.
Indonesia's air travel industry is booming, with the number of domestic passengers growing significantly over the past decade, but it has acquired a reputation for poor regulation and its airlines had previously been banned from United States and European airspace.
It's not clear whether the black box found Thursday was the flight data recorder or the cockpit voice recorder, both of which are usually called black boxes, Australia's 9News channel reported.
Lion Air has ordered 50 of the MAX 8 planes and one of its subsidiary airlines was the first to operate the new generation jet previous year.
Indonesian investigators said they were homing in on the black box from a crashed jetliner after locating its "pings" yesterday, two days after the jet crashed shortly after take-off with 189 people on board.
Divers conduct an operation near the search area of a site where Lion Air flight JT610 plane had crashed, off Tanjung Pakis, Indonesia, Wednesday, in this still image taken from a video obtained from social media.
Distraught family members struggled to comprehend the sudden loss of loved ones in the crash of a plane with experienced pilots in fine weather.
There is as yet no indication of what caused the crash, though there are reports the aircraft had experienced technical problems on earlier flights.
No distress signal was received from the aircraft's emergency transmitter, search and rescue agency head Muhmmad Syaugi told a news conference.
The flight data recorder holds information about dozens of parameters of the aircraft's performance, including its speed, altitude and direction.
Officials from Boeing are meeting the Indonesian authorities on Wednesday as part of the investigation. "The Jakarta police commissioner warned this could be hard, and each body bag so far transferred could contain the remains of more than one person". Safety experts cautioned, however, that the data must be checked for accuracy against the plane's so-called black boxes, if they are recovered.
Just a few minutes into the flight, the pilot asked permission to return to the airport.
The country has had issues of safety and poor management in the past and its airlines were banned from flying into European airspace until 2016.