Experts considered on Wednesday three hypotheses about the crash of the TANS airliner in northeast Peru Tuesday, resulting in 39 deaths, 11 missing and 57 survivors.

The first one has to do with torrential rains and heavy winds in the area of the disaster - the city of Pucallpa -, whereas the second and third, have to do with human error and mechanical malfunction, respectively.

Some survivors said that turbulence rocked the airliner, a Boeing 737-200, which was like a piece of paper on the air.

With respect to the second cause, human error, experts consider it originated from the fact that the pilot did not change the route during the flight, as the plane has a meteorologic radar that warns about adverse conditions to land or take off.

The third hypothesis says the aircraft had inadequate conditions to fly and demanded maintenance.

A spokesperson of the General Civil Aeronautics Direction announced the finding of the "black box" of the plane and said that within 90 days the case of the incident will be made public.

The plane of Peruvian State-run TANS airline covered the Lima- Pucallpa-Iquitos route, when at least 10 minutes prior to arriving in Pucalpa's airport (840 kilometers east of the capital) lost contact with the control tower.

Seemingly, the pilot tried to crash land on the Federico Basadre Highway, next to the airport, but heavy winds pushed it to a marshy area.

Rescue tasks were hindered by the terrain and weather conditions, said the rescuers.

Source: Xinhua