Divers retrieve AirAsia 'black box', explosion theory questioned

Indonesian divers hold the flight data recorder of AirAsia QZ8501 onboard the navy vessel KRI Banda Aceh, in the Java Sea January 12, 2015. [Photo/Agencies]

The flight data recorder was brought by helicopter to Pangkalan Bun, the southern Borneo town that has been the base for the search effort, and then flown to Jakarta for analysis.

The black box looked to be in good condition, said Tatang Kurniadi, the head of the transport safety committee.

Investigators may need up to a month to get a complete reading of the data.

"The download is easy, probably one day. But the reading is more difficult ... could take two weeks to one month," the NTSC's head investigator, Mardjono Siswosuwarno, said.

Over the weekend, three vessels detected "pings" that were believed to be from the black boxes, but strong winds, powerful currents and high waves hampered search efforts.

Dozens of Indonesian navy divers took advantage of calmer weather on Monday to retrieve the flight recorder and search for the fuselage of the Airbus.

Forty-eight bodies have been retrieved from the Java Sea and brought to Surabaya for identification. Searchers believe more bodies will be found in the plane's fuselage.

Relatives of the victims have urged authorities to make finding the remains of their loved ones the priority.

"I told our soldiers that the search isn't over yet," Armed Forces chief General Moeldoko told reporters. "I am sure the remaining victims are in the body of the plane. So we need to find those."

Indonesia AirAsia, 49 percent owned by the Malaysia-based AirAsia budget group, has come under pressure from authorities in Jakarta since the crash.

The transport ministry has suspended the carrier's Surabaya-Singapore licence for flying on a Sunday, for which it did not have permission. However, the ministry has said this had no bearing on the crash.

President Joko Widodo said the disaster exposed widespread problems in the management of air travel in Indonesia.