Investigators will soon be nearly 鈥�100 per cent certain鈥� what happened to an AirAsia plane that crashed into the Java Sea two weeks ago now that investigators have pulled the flight data recorder from the wreckage, aviation experts say.

Divers have recovered the flight data recorder from beneath one of the plane鈥檚 wings and sent it to Jakarta, Indonesia鈥檚 capital, for analysis.

The cockpit voice recorder has also been found, but has yet to be pulled from the dense, submerged wreckage.

The data recorder will provide investigators with hundreds of different measures taken during the flight, aviation expert Karl Moore

鈥淲hat they鈥檙e looking at is all these different pieces of data that were collected before, during and after the incident,鈥�

鈥淚t provides a lot of information to really essentially allow you to say what happened and why this crash occurred almost certainly.鈥�

Investigators will learn key information about the aircraft鈥檚 flight, including the plane鈥檚 altitude, speed, direction 鈥渂asically anything the aircraft was experiencing or had done to it by the pilots,鈥� Bernie Leighton of AirlineReporter.com

An investigator at Indonesia鈥檚 National Committee for Safety Transportation said it could take as long as two weeks for the data to be downloaded and analyzed. But investigators could begin releasing preliminary findings as early as Tuesday, Leighton speculated.

Voice recorders yet to be recovered

Once the cockpit voice recorder is pulled from the wreckage and taken for analysis, Leighton said, it will tell investigators about the decisions the pilots were making as they tried to cope with whatever was happening to the plane.

As well, investigators will hear whether the pilots tried to broadcast any warnings about problems with the aircraft before it went down.

Within a couple of weeks, investigators will be between 鈥�99 per cent and 100 per cent certain鈥� what happened to the plane,

AirAsia Flight 8501 from Surabaya, Indonesia to Singapore, crashed into the Java Sea on Dec. 28, killing all 162 passengers and crew on board.

Less than halfway through the two-hour flight, the pilots had asked to climb from 32,000 feet to 38,000 feet to avoid storm clouds. Air traffic controllers denied the request, citing heavy flight traffic.

Four minutes later the plane dropped off the radar.