Neil Hansford, an aviation consultant from Strategic Aviation Solutions, said the black box was typically the first point of call when seeking information about plane crashes that occurred in remote areas. .....
.................
"I think this one is going to get down to what's called a stall," Mr Hansford said.
"[The pilot had] been coming in too slow.
"As soon as you bank to the left, then obviously you lose all the wind lift and it goes down like a stone.
"Once you get into a stall at low altitude and low speed, there's generally only one consequence."
He said the aircraft would have given the pilot stall warnings, and he believed the crash was due to human error.
"When you're at low speed, you don't start making heavily banked turns," he said.
"I think [the pilot's] level of competence had been reached."
Here's an aviation 'expert' quoted on ABC News in Australia. Since we have no evidence of anything other than the aircraft stalled on approach, I think it says more about the competence of Mr hansford to comment on this incident than the competence of the pilot(s).