The first officer, not the captain, was flying AirAsia Flight 8501 when it crashed.
Divers on Monday retrieved the crucial flight data recorder of the AirAsia plane from the Java Sea in a potential breakthrough to solve the mystery of the crash, as an Indonesian official said the jet 'exploded' on impact with the water due to rapid change in pressure.
Investigators said the system that helps control the movement of the aircraft's rudder had a cracked solder joint that malfunctioned four times during the flight.
AirAsia Indonesia allegedly violated standard procedures which resulted in the pilots of the airline's doomed plane not receiving a required weather report before takeoff, a media report has said citing leaked official documents.
Divers were on Saturday sent to investigate underwater pings that may be coming from the flight recorders of the AirAsia plane as efforts continued to retrieve the jet's tail from the bottom of the Java Sea.
Rescuers hunting for the crashed AirAsia plane on Friday detected 'pings' believed to be from its crucial black box, a top Indonesian official said, raising hopes of unravelling the mystery of the deadly crash.
Divers on Thursday searched the sunken fuselage of the crashed AirAsia jet in the JavaSea to retrieve the missing bodies of the 162 people killed in the disaster, a day after the main wreck was located in the choppy waters after over two weeks of multi-national hunt.
Doomed AirAsia jet's fuselage was found on Wednesday raising hopes of retrieving the remaining bodies of the 162 people killed in the tragedy, as investigators downloaded the contents of black box recorders and were likely to crack the crash's mystery soon.
Divers on Tuesday retrieved the cockpit voice recorder and may have located the fuselage of the crashed AirAsia jet in the Java Sea as experts will now use data from the two crucial black box devices to determine the sequence of events that brought the flight down. The cockpit voice recorder, that possesses the last two hours of conversation between the pilots and with air traffic controllers, was found close to where the flight data recorder was recovered from the bottom of the choppy waters on Monday.
Rescuers found 30 bodies with 5 of them still strapped to their seats as multi-national teams equipped with sophisticated equipment narrowed the search to a 5 sq km area of the choppy Java Sea where some debris of the ill-fated AirAsia jet have emerged.