The co-pilot of AirAsia Flight QZ8501 was flying the passenger jet when it crashed last month, officials have said.
It was last week reported that the plane was climbing at a speed "beyond normal" before stalling.
Recovery efforts are still underway following the crash, which left all 162 on board dead.
The AirAsia plane that crashed into the sea last month was climbing at a speed "beyond normal" before stalling, radar data is thought to have shown.
According to the AFP news agency, the country's transport minister said: "The plane suddenly went up at a speed above the normal limit that it was able to climb to. Then it stalled."
Flight QZ8501 went missing on 28 December in stormy weather over the Java Sea.
Terrorism has been ruled out as a cause of the crash, but a search and rescue said last week that the plane had experienced an explosion before hitting the water.
The bodies of 53 of the aircraft's 162 passengers and crew have been recovered in search efforts so far.
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