Divers have located a "black box" from Lion Air flight JT610, which crashed into the Java Sea earlier this week with 189 people aboard, offering a critical piece of evidence in the investigation into what caused the disaster.
Indonesian rescuers said that the Boeing crash there were no survivors.
The airline is to meet a team from Boeing on Wednesday to discuss the fate of its 737 MAX 8 planes.
Haryo Satmiko, deputy chairman of the National Transport Safety Committee, said evidence shows the jet hit the water at "tremendous speed" before breaking apart.
The extent of damage to the device showed the "extraordinary impact" of the crash, he said.
Safety experts cautioned, however, that the data must be checked for accuracy against the plane's "black boxes", which officials are confident will be recovered. Speaking about the overall investigation's progress, Wibowo said, "We have collected data and did find some problems, but it must be investigated further". The pilot had already received permission to return to base. Divers were battling strong currents as they scoured the surface of the sea, and had widened the search area, pulling out heaps of debris, including life jackets and clothing.
Anguished family members have been providing samples for DNA tests and police say results are expected within four to eight days.
Hopes are fading of finding a large section of fuselage intact, with easily retrievable bodies inside.
Armed forces chief Hadi Tjahjanto said of the object: 'Hopefully that is the main body of the plane we've been looking for'.
Another passenger said the flight was turbulent and the seatbelt signs remain on throughout the flight.
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Lion Air flight JT610 crashed not long after departure from Jakarta on Monday morning.
The privately owned budget carrier was founded in 1999.
Indonesia has had almost 40 fatal aviation accidents in the past 15 years, according to the Aviation Safety Network.
It will now be subjected to more intensive "on ramp" inspections than other airlines, authorities said.
"I cried when I heard the news because my friends were aboard the flight", he said after the news broke.
Indonesia is one of the world's fastest-growing aviation markets, but its safety record is patchy. It will reportedly be examined by the National Transportation Safety Committee.
Danang Mandala Prihantoro, a spokesman for Lion Air, said Wednesday that the airline fired its technical director, Muhammad Asif, at the direction of the Ministry of Transportation.
Lion Air has acknowledged that the twin-engine jetliner had also experienced a technical problem during its previous flight, from Bali to Jakarta on Sunday, though maintaining that it was "resolved through maintenance procedures issued by the aircraft's factory".
"We have also intensified (on-site) checks on Lion Air, starting today", Budi said, referring to monitoring of the airline's airmen, operator and the company itself to ensure that they are conducting flights safely and in compliance with regulations.