From an article online in the Sydney morning herald.
Mr Soejatman said the plane was equipped with a Mode S radar, a relatively new piece of equipment which sends more comprehensive information, in real time, from aircraft to ground.
Leaked figures show the plane climbed at a virtually unprecedented rate of 6000 to 9000 feet per minute, and "you can't do that at altitude in an Airbus 320 with pilot action".
The most that could normally be expected would be 1000 to 1500 feet on a sustained basis, with up to 3000 feet in a burst, he said.
The plane then fell at an even more incredible rate: 11,000 feet per minute with bursts of up to 24,000 feet per minute.
He said the Air France A330 Airbus that crashed in 2009 killing 228 passengers also reached dizzying ascent and descent rates, but some of the figures cited by Mr Soejatman are higher.
"We can't rule out that the data is wrong," he said, but added that they came from the aircraft itself, transmitted over the Mode S radar.