Pings detected in search for AirAsia jet's black box

Indonesian navy engineers check a helicopter as they prepare operations to lift the tail of AirAsia flight QZ8501 from the Java sea January 9, 2015.[Photo/Agencies]

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

Forty-six bodies and debris from the plane have been plucked from the surface of the waters off Borneo, but strong winds and high waves have hampered efforts to reach larger pieces of suspected wreckage detected by sonar on the sea floor.

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

The transport ministry has suspended the carrier's Surabaya-Singapore licence, saying it only had permission to fly the route on Mondays, Tuesdays, Thursdays and Saturdays.

Flight QZ8501 took off on a Sunday, though the ministry said this had no bearing on the accident.

While the cause of the crash is not known, the national weather bureau has said seasonal tropical storms common in the area were likely to be a factor.