Air Crash Investigation denied all engines.
Base «Lajes» 2001.
On the night of August 24 2001 years fueled Airbus A-330, Which was carrying 306 passengers crossing the Atlantic and halfway he refused both engines. How could it happen that the modern airliner, equipped with a powerful computer, turned the face of the terrible catastrophe?
Toronto Pearson International Airport. 23 2001 year in August. It was a normal working day of the airport. The newly created charter company «Air Transat» quickly became one of the largest airlines in Canada. In the summer of business activity is stopped, and all in a hurry to leave. Flight 236 heading to Lisbon. On board were Canadians flying in Europe and Portuguese workers, who were returning home. Aircraft Airbus 330 ruled Captain Robert Piché, and the co-pilot Dirk de Jager.
Expert: Captain Robert Piché extraordinary man and a great pilot. He was very experienced. Besides, he was in Quebec, where the pilots receive the best training.
Airbus A330 was built with the latest technology. It is equipped with a computer connected to thousands of all kinds of sensors that constantly monitor the operation of all systems. Looking ahead, we can say that the pilots reacted with disbelief to the testimony of computers. This could have resulted in dire consequences.
The first hours of flight on board the flight 236 relaxed atmosphere prevailed. In 20: 10 Airbus A330, carrying tons of fuel was 47 flew from Toronto to Lisbon. Forecasters promised good weather over the Atlantic. The flight was fine, but the manager dismissed them somewhat off course. To unload the track, the dispatcher sent a plane on 100 kilometers to the south. This minor amendment subsequently played a decisive role in the fate of the aircraft. It was evening, and the passengers were preparing for long-distance flights.
Passenger: Everything went fine. I have used the services of the company "Air Deck chair"And she did not really like it. At the time, I was pleasantly surprised. We took off on time. The aircraft was new and comfortable. I have decided that we will have a pleasant trip.
Plane crash video
Every 30 minutes the crew verifies their location with the flight map. The aircraft was equipped with modern computers, but calculation of the availability of fuel on board is still done by hand. Comparing the amount of fuel in the tank to its original volume, the pilots tracked fuel consumption. First 5 hours everything was normal: flow rate corresponded to the distance traveled. But soon came the first cause for concern. Sensors began to show that the oil pressure in the first engine was normal, and the second somewhat elevated. Also, the display could be seen that oil temperature fell in the second engine. It is very strange! The pilots were perplexed.
Judge: If the display such data - this means that the sensors are faulty.
The oil temperature can not fall. It can only go up. Therefore, the pilots did not pay attention to it. What was unusual was the fact that blood pressure rose oil. This indicated that the fuel oil fell. But this is not mentioned in any directory for pilots.
The crew contacted the technical service located in Montreal. Unfortunately, the ground crew was not able to help them. Pilots had to solve the problem themselves. Because the computer has issued such a strange message, the pilots decided that it was a mistake. But they continued to monitor the level of oil. «Air Transat» 236 continued flying. 20 minutes later there was a new message: fuel imbalance. This they never had. In Airbus A330 fuel stored in large tanks located in the wings. The computer has detected that the level of fuel in the right tank is much lower than in the left. In this case, all advised Reference produce fuel bypass via a bypass valve. But before opening the bypass valve, the pilots had to make sure that the fuel imbalance is not a result of a larger problem - fuel leakage. For 15 minutes to detect problems pilots checked the fuel level, and it was normal. So they opened the bypass valve between the tanks.
Expert: The results should be seen immediately. Normally, the situation is stabilized immediately.
However, in the case of a board that did not happen 236. The pilots did not know that the second motor located on the right wing there is a serious fuel leak. Then the plane was at an altitude meters 12000 300 miles from the nearest land.
At this time, fuel consumption exceed all known standards. On-board computer has issued a number of warnings, however, the pilots decided that this is an error. This was compounded by the fact that in the structure of the aircraft to determine leakage was practically impossible.
Expert: Airborne systems consist of hundreds and hundreds of sensors. They are very sensitive to external influences, such as ice or snow. They can produce corrupted data.
The pilots did not have any evidence to say that the fuel level drops faster than its consumption of the motor. They had no reason to believe that there is a leak. Soon, however, the co-pilot Dirk de Jager took the calculations. After them, he realized that there is something serious. Dirk found a striking difference. Fuel was literally running out. Even reserve tank was almost empty. Captain Pichet asked flight attendants to look for leaks. He also said the co-pilot once again to settle the reserve fuel. In the afternoon it was not difficult to determine whether there is a leak. But in the darkness of the night, even with a flashlight to see anything was impossible.
Expert: At this time the crew realized that the situation did not improve. On the contrary, it became more and more threatening.
The pilot decides what to do next. They contacted the OCA service to find out where the nearest runway. They were informed that the closest the band has been on a military base «Lajes», located on a tiny island in the Atlantic Ocean. The pilots did not dare go to the landing. They still believed that all problems - a failure of the computer. Flight 236 continued to fly further south 25 minutes. It seemed everything was normal, but the computer continues to produce alarming information on the number of fuel.
In 6: 13, less than an hour after the first message, the pilots realized that the situation has become critical. To the right engine fuel have been reported and it stalled.
Passenger: The lights in the cabin began to flicker, and I realized that it was not good.
The plane could not fly at an altitude of 12000 meters on one engine. Pilots were forced to descend to an altitude of 10000 meters. They have suffered a disaster, so the Airbus A330 sent to a military base «Lajes». They had to fly more 250 kilometers. The aircraft was able to reach more 10 minutes left engine. After that he started to act up. Fly was still 157 kilometers. Soon, the left engine also stalled. One of the most reliable aircraft, carrying the crew and passengers 306 turned into a giant glider, which flew straight to the ocean.
Passenger: Suddenly there was a click, and everything. Complete silence. Inside, there was no sound.
A special pseudo-fueled turbine vital equipment electricity. So he remained manageable. The pilots felt as they can plan. Before the fall of the ocean they had 14-15 minutes. Without engine each 5 kilometers plane was down 300 meters. They could hold on to the Azores and land on the basis of «Lajes». But if the pilots made a mistake they would have to sit on the water. Since the plane is a power failure, occurred depressurization. Everyone had to wear oxygen masks. Also, the flight attendants were preparing passengers for emergency landing on water. In the cabin started to panic.
Passenger: I saw the flight attendant brought life jackets. It was a bad sign. I realized that there is something very serious.
Plant a large aircraft on the water is very hard. If they had to do it - chances of survival would have been slim.
Ground-based services «Lajes» preparing for landing huge liner. For 20 minutes before landing, the pilots began to prepare for the most dangerous part of their mission. They still It had to land the plane without a working engine. They had no margin for error. When they had 13 kilometers they tried to lose height and speed. Pilots flaps, however, when approaching the band speed has increased dramatically. There was a risk to jump off the runway. Captain Pichet performed several complex maneuvers to slow down before landing. They lined the giant airliner. The plane hit the strip at very high speed. The pilots did their best to stop the plane, but without engines it was very difficult. Losing 8 tires, Airbus A330 finally stopped in the middle of the runway.
Passenger: I wanted to quickly get out of the plane. I jumped out, hit the ground and burst into tears like a child.
Robert Piché and Dirk de Jager managed to fly without motors more than anyone ever in the history of civil aviation. The aircraft and passengers were saved. But how could it happen that in the modern airliner ran out of fuel?
Authorities immediately set up a commission to investigate the incident. Soon it was found that all tanks were indeed empty. Experts carefully examined all the fuel and hydraulic drives. Soon they found what they were looking for just the right engine.
Expert: The fact that the diameter of the hydraulic drive was slightly less than the diameter of the fuel pipe. Under the influence of vibration in the hydraulic hose, hydraulic drive jumped and began to rub against the fuel hose. As a result, a hole therein through which the fuel has to flow. Over time, the hole grew bigger and bigger. Shortly fuel poured the river before reaching the engine.
Experts began to check the maintenance records. It turned out that 19 August for 5 days before the flight, the company «Air Transat» seized the faulty engine and replaced it with a new one that was delivered by «Rolls Royce». Soon, experts have found a terrific mistake. She was admitted to maintain the aircraft. The company «Rolls Royce» is not equipped with a hydraulic pump motor. Then the mechanics decided to use a pump from an old engine. But they do not exactly fit together. They rubbed already 5 days until something happened that took place over the Atlantic.
Expert: The engine was equipped with two hoses and clamp, which should maintain the necessary clearance. Mechanics took the bracket from the old motor and install it on the new one. But pipes were different and there was friction.
When the Commission questioned the mechanics «Air Transat», it was found out another unpleasant details. Chief mechanic said he knew that the hoses are not suited to the new engine. He reported it to his superiors. Yet the company decided that the plane could not stand because of the missing parts. They believed that nothing would happen if they used the old hoses. The difference in diameter of the hose is only a few millimeters. But this difference could cost lives 306 passengers.
A few days after the incident, the company «Air Transat» publicly acknowledged his responsibility for what happened.
Expert: This mistake cost the company dearly. They had to pay a fine of a quarter of a million dollars. It is the largest fine ever paid a Canadian airline.
But that's not the end of history. What is the role of pilots in the events of August 24? When they opened the bypass valve to transfer the fuel from the left tank to the right of the 30 17 minutes it was lost tons of fuel. Why do not they close the valve to prevent further leakage? The pilots thought that the computer gives incorrect information on the fuel system. Then they simply acted according to instructions, not knowing about the leak. Their mistake was that they did not think about why there was such a problem. When they were convinced that it was a leak, they have no choice. By the time the engines had stalled.
Sophisticated technical equipment of modern aircraft makes them more reliable. But at the same time, this could lead to flight 236 terrible catastrophe. The discrepancy led to the leakage of hoses and distrust of computers has led to the pilots incorrect assessment of the situation. All of this has had serious consequences. Well, that dispatch service from the very beginning directed the plane to 100 kilometers to the south. With this flight 236 appeared near the Azores and was able to make an emergency landing.
After the incident, the company made changes to the instructions in the event of leakage of fuel. Firms «Airbus» and «Rolls Royce» also made great efforts to such situations no longer existed.
- Aviation and literature
- A uniform
- Military aviation
- Civil Aviation
- Helpful information
- The calendar
- Aviation and music
- game air
- Plane Crash
- Aviation and cinema
- Educational establishments
- Author's articles
- Assemblies and units of air equipment
- The probability of catastrophes
- Online Timetable
- The calculation of the distance
Best in the world of aviation