According to investigating officials, the plane had climbed at excessive speeds to an unusually high altitude before plunging and disappearing from radar.
A parliamentary commission, which asked about the investigation report, was told that the radar data showed that the Airbus A320-200 was climbing at about 6,000 feet a minute before it crashed killing all 162 people aboard.
Media report quoted officials as saying, "It is not normal to climb like that; it's very rare for commercial planes, which normally climb just 1,000 to 2,000 feet per minute. It can only be done by a fighter jet."
Meanwhile, sources on the condition anonymity also said, "The warning alarms, we can say, were screaming, while in the background they (the pilot and co-pilot) were busy trying to recover." [AirAsia jet's alarms 'screaming' before crash: investigator]
The investigator, from Indonesia's National Transportation Safety Committee (NTSC), added that the pilots' voices were drowned out by the sound of the alarms.
The two black boxes -- the cockpit voice recorder and the flight data recorder -- were recovered last week after a lengthy search, and investigators are examining them.
Investigators have listened to the data from the cockpit voice recorder, and are also looking at a wealth of information from the flight data recorder, which monitors every major part of the plane.
(With agency inputs)