Rescue workers have found the wreck of the missing Siriwijaya Air flight SJ182, which crashed a few minutes after take-off with 62 people.
The rescuers have now identified the position of the voice and flight data recorders in the cockpit, which they hope will shed light on the tragedy.
Body parts and clothing were among the items pulled from the Java Sea, authorities said in a statement.
The Chief of the Indonesian Air Force, Hadi Tjahjanto, said: “The two signals emitted by the black box are continuously monitored and now we have tagged them.
“Hopefully in not too long a time we can raise the black boxes for the National Transportation Safety Committee to investigate and find out what caused the crash.”
There were ten children on board, and the relatives had to wait excruciatingly for their fate to be confirmed.
The Boeing 737-500 was en route to Pontianak in West Kalimantan before disappearing from radar screens four minutes after takeoff on Saturday.
The crash marks the first major airline incident in Indonesia since a Lion Air Boeing 737 Max crashed in 2018, killing all 189 passengers and crew.
This plane also crashed into the Java Sea shortly after taking off from Soekarno-Hatta Airport.
“We saw signals in two places,” said Bagus Puruhito, head of the Indonesian search and rescue agency, to reporters on board a military ship. “This could be the black box – we’ll investigate.”
Indonesian naval officer Wahyudin Arif told iNEWS that they had found suspicious parts of the aircraft fuselage about three feet long that were part of a tire and parts of the human body.
According to media reports, body parts were taken to a police hospital for identification.
Search teams and fishermen have previously found other debris and part of an evacuation slide believed to have come from the jet in the seas off Jakarta.
“I am optimistic that we will find (the plane) soon,” Henri Alfiandi, an assistant to the chief of staff of the Indonesian Air Force, told a press conference.
Muhammad Yassin, director of the POLAIR marine police, told local media the search is centered on the outer ring of the islands of Laki and Lancang off the coast of Jakarta.
The sea in this area is about 65-75 feet deep.
Sriwijaya Air’s aircraft was a nearly 27-year-old Boeing 737-500, much older than the troubled Boeing 737 MAX.
Older 737 models are widespread and did not involve the system in the MAX security crisis.
“We are in contact with our airline customers and are ready to support them in this difficult time,” Boeing said in a statement. “Our thoughts are with the crew, passengers and their families.”
Distraught relatives waited for news of loved ones in Pontianak, some 460 miles from Jakarta.
A crisis center for relatives has been set up at Jakarta’s main airport.
The Sriwijaya Air Group, founded in Jakarta in 2003, mostly flies within Indonesia.
The low-cost airline has a solid safety record, with four incidents recorded in the Aviation Safety Network database showing no on-board losses.