Details of the incident with the Boeing 777 in the Moscow region have become known

The cause of the emergency on board the aircraft shortly after departure from Domodedovo Airport was leaking oil from a damaged backup generator under the hood of the left engine. A source in the aviation services familiar with the situation told Izvestia on December 4. The technical fluid caused smoke, but there was no open combustion, which is why the aircraft was not seriously damaged. Gorenje

On the fourth minute of the flight, at 21:23 Moscow time, a fire alarm went off in the cockpit of the left power plant. The pilots noticed changes in its operating parameters and, acting in accordance with the flight operations manual, turned off the left engine. They did not resort to a fire extinguishing system.

"After takeoff, an alarm went off on one of the engines. The pilots shut down the power plant according to all the rules and reported it. The fire extinguishing system wasn't even turned on," said a source in the aviation industry.

The exhaust gas temperature returned to normal, there was actually no engine fire, which the crew reported to the dispatchers and began preparing to return to the departure airport with one engine.

"The aircraft needed to drain the fuel before landing so that the aircraft's landing weight would not be exceeded. This dump is on the video, no wonder there was a smell of kerosene," the source said.

The Boeing 777 was refueled for a long-distance flight from Moscow to Phuket (Thailand), and its mass in the first minutes of flight exceeded the permissible for landing.

The flight lasted about 1.5 hours. Boarding at Domodedovo took place normally at 22:53. There were 412 passengers and 13 crew members on board. According to the Federal Air Transport Agency, none of them were injured.

"The initial inspection showed that there is mechanical damage to the backup generator — the "backup" system <...> Soot in the engines could appear due to oil, which, apparently, got into the hood from the damaged backup generator," the source told Izvestia.

It is not yet known what caused the mechanical damage. The Central MTU of the Federal Air Transport Agency will investigate the incident and determine the causes of the incident.

"If oil gets on hot parts of the engine, it can smoke without a fire," Andrey Patrakov, founder of the RunAvia flight safety service, told Izvestia.

There can be a lot of reasons for damage to the generator and the investigation will help to establish them, he added.

According to Patrakov, the generators are needed by the aircraft for the power supply of the on-board equipment and for the operation of the electrical control system. Therefore, the aircraft has a four-fold redundancy of power supplies. There are main and backup generators on each engine. In addition to them, an auxiliary power plant (APU) operates with its own generator, and in case of its failure, the aircraft are equipped with a wind turbine (RAT), the expert notes.

When fully loaded, the take-off weight of the Boeing 777 is 30-40 tons more than the landing weight due to full tanks, Honored pilot of Russia Yuri Sytnik told Izvestia. To land immediately after takeoff, these surpluses must be discarded so as not to damage the landing gear and braking system. They do this at an altitude of over 1.5 thousand meters, at which the liquid evaporates and does not harm people and infrastructure on earth. In this situation, the crew performed everything correctly and landed the plane normally with one engine running, the honored pilot believes.

An emergency landing of a Boeing 777 in Domodedovo with 425 people on board. What is known

Artem Korenyako, a representative of the Federal Air Transport Agency, said a day earlier that the Boeing 777 landed at Domodedovo Airport due to engine problems. There were 415 passengers and 13 crew members on board. There were no casualties as a result of the incident. According to the Izvestia source, the cause of the incident was an engine fire. On December 4, the prosecutor's office organized an investigation into the incident with the Boeing 777

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