Indonesian divers recovered a flight recorder from the downed Lion Air jet on the sea floor on Thursday, a crucial development to find out what caused the new plane to plunge into the sea and kill 189 people.
"The ping sound is clearer", Haryo Satmiko, deputy chairman of the National Transportation Safety Committee (KNKT), told Reuters.
Indonesia's transport minister ordered an inspection of all 737-MAX aircraft on Tuesday.
In a detailed post online, Conchita Caroline says boarding of the Bali to Jakarta flight was delayed by more than one hour and when the plane was being towed, a technical problem forced it to return to its parking space.
Flight crew reported an issue with the plane the night before the flight, and repairs were carried out.
Syaugi said one of the ships with high-tech equipment being used in the search dispatched a remote-operated vehicle that recorded parts of the aircraft on the seafloor but not the 22-meter (72-foot) -long object detected at a depth of 32 meters (105 feet) that is believed to be the fuselage.
The cockpit voice and flight data recorder could be key pieces of evidence.
Despite usually being known as black boxes, the devices are typically bright orange.
"We followed the signals and narrowed the search area".
It is assumed that this part can be a body of the aircraft, reports our site. Others sorted through recovered materials, including passports and wallets.
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Finding survivors "would be a miracle", Yusuf Latif, the spokesman of the National Search and Rescue Agency, said Monday afternoon.
Lion Air, Indonesia's biggest budget airline which has been engaged in huge expansion, announced earlier this year it was buying 50 Boeing-737 MAX 10 jets for US$6.24 billion.
On Monday, Lion Air acknowledged the jet had an unspecified technical issue fixed in Bali before it was flown back to Jakarta, calling it "normal procedure". On Board the Boeing 737 of the airline Lion Air was 189.
Indonesian carriers were barred in 2007 from flying to Europe because of safety concerns, though several were allowed to resume services in the following decade.
Flight 610 was carrying 181 passengers, as well as six cabin crew members and two pilots, from Jakarta to Pangkal Pinang, on the Indonesian island of Bangka. Nearly immediately after takeoff, aircraft commander put in a request at the airport on the return.
"This morning I've been briefed by the head of Search and Rescue Agency about the strong possibility of the location coordinates of Flight 610", he said.
Aviation analysts said it was too early to determine what caused the accident.
"What's most peculiar to me is the fact that they didn't declare an emergency".
It said the engines were a product of a joint venture between US-based General Electric and France's Safran Aircraft Engines.