AirAsia aircraft can

Experts believe that the QZ8501 may have been flying too slowly when it came to bad weather, leading to a lurch and death in the sky.

Geoffrey Thomas, an aviation expert and editor of airlineratings.com, spoke with several captains and believed that the QZ8501 met difficult weather conditions, but flew too slowly when trying to avoid it.

"The pilots believed that when trying to avoid the storm by increasing altitude, the plane flew too slowly, causing the plane to lose balance and die, just like the 2009 Air France AF447 crash , " Mr. Thomas told AAP.

An AirAsia plane.(Photo: Skynews)

Air France AF447 plane crashed into the Atlantic in 2009 while traveling from Rio De Janeiro to Paris.

"I have a radar chart, in which the plane flies at 36,000 feet (11,064m) and increases altitude at 353 knots (653km / h), slower than the required speed of 100 knots. (160km / h), " said Thomas. If this chart is correct, "at that height, the velocity is extremely dangerous," he added.

"It has a huge flow of gas or something similar," he continued.

"Basically, the plane is flying too slowly compared to altitude and flying in thin air, the wing of the plane cannot operate properly at that speed, causing the plane to float and die , " said Thomas. said.

In addition, the A320 is an advanced model, but is not equipped with the latest radar. The advanced radar, pioneered by Qantas in 2002, can provide a more complete and accurate assessment of the storm, but it has not been installed on the A320 until next year.

"If you don't have a multipurpose radar, you'll have to tilt the radar manually, and you have to look down at the start of the storm to determine the humidity and rain, and then you can assess the situation. It's sports. Manual work, so there may be mistakes in this process. This has happened, " said Thomas.

The AirAsia airline's aircraft carrying 162 people lost contact with air traffic control on the road from Surabaya, Indonesia, to Singapore on the morning of December 28. Indonesia's vice president said the plane may have fallen. The search for the missing plane was resumed today with the participation of many countries.