Investigation report on the disappearance of air France passenger plane

20 12 On July 5th, BEA released the final investigation report of the 2009 Air France passenger plane accident. It shows that the double reasons of man-made disaster and weather eventually led to the failure of Air France flight AF447 in Brazil.

According to the record of the black box, it was not until the last three seconds that the pilot arrived and then sank into the Atlantic Ocean. But between the pilot's operational error and the frost on the high-altitude tester, who is the real main cause is still inconclusive. Some experts pointed out that this operational error could have been avoided, and some family members of the air crash believed that the French government tried to shift more responsibility to the pilots.

copilot

The final version of the report jointly investigated by France, Germany and Brazil was released on July 5, French time. The report pointed out that the plane crash was caused by both technical failure and human error.

The reason is that the pitot tube velocimeter made by Terez company in the plane is at high altitude, which leads to inaccurate data. Alain Bouillard, director of BEA accident investigation, said: "At that time, the unit was completely out of control." In addition to emphasizing the crew's improper response in critical situations, the report also pointed out that there were mistakes in the training received by pilots. "The instructions for the use of the aircraft may have misled the crew's misconduct at that time."

In fact, according to the recovery information on the black box retrieved from the plane in April 20 1 1, four hours after take-off, the captain of the plane, Marc Dubois, left the cockpit according to the scheduled nap plan. Just then, AF447 flew into the freezing rain area.

According to the recording of the black box, Boning, a 32-year-old co-pilot, flew for less than 5,000 hours, actually controlling the plane. Unfortunately, he has never operated at such a high altitude. After flying in, bonet adjusted the flight route, but the speedometer and automatic control system of the plane lost this.

Later, Bonin made a fatal mistake: he made an operation to make the plane climb to a higher altitude, but in fact, the engine of the plane was already there.

Then the alarm sounded constantly, and Captain du bois could not control the situation after returning to the cockpit. According to the records of the black box, the pilots didn't realize what they wanted until the last three seconds, and then they sank into the Atlantic Ocean.

The investigation report provided by BEA also wrote: "Although these phenomena continue, the crew never realized that they were stalling, so they never really recovered."

Automatic dependence

This BEA report * * * puts forward the safety suggestion of 3 1, which is aimed at both airlines and aircraft manufacturers.

According to Jean-Paul Addeke, director of BEA, eight of them involved pilot training and five involved aircraft safety certification. Shortly after the report was released, Airbus promised to take all necessary measures to improve the safety performance of the aircraft.

VOSS, chairman and CEO of the Flight Safety Foundation, said: "This accident could not have happened." He said that this is closely related to the current heavy dependence on automation in flight.

In fact, in any flight, the pilot's manual operation time is about 3 minutes, taking off 1 minute and a half, and landing 1 minute and a half. "For pilots, there are not many opportunities to operate the aircraft manually." After the Air France incident, Voss said that many airlines began to go back and retrain pilots for manual flight, but it was not enough for them to do so.

"I think there is still a gap in training. We must see the reality that aircraft will become more and more automated, especially considering that the safety performance of aircraft has been greatly improved due to automation, so this is definitely a positive development. " Voss said, "What we have to consider is how to keep people up with the automation process."

In 2009, China International Airlines boarded the plane with 228 people, including all crew members, including 9 passengers.