The most likely cause of the disaster Boeing 737-800 airline Flydubai, which took place last Saturday at the airport of Rostov-on-Don, called crew mistake, for failing to raise the car to the second round after landing attempts in adverse weather conditions. Meanwhile, some Russian experts believe that this maneuver is not much of a challenge for pilots, and could prevent them rather than the weather, and the control rod failure Boeing wheel height. Attempts by the crew of “drag” mechanism jammed the controls may have sent the ship, which was carrying 62 people, a deadly peak.
Interviewees “Y”, experts believe that the crew had flown early Saturday morning at the airport of Rostov-on-Don Boeing 737-800 in a difficult situation. After a four-night trip plane could not land because of the gusty, but still blowing shift at different heights of wind and sleet. Another attempt at landing, done in 1 hour 40 minutes circling in the so-called waiting area, again failed. The crew, lower the machine to the level of 270 meters, had to again climb to care for the next round. After rising to a height of about 940 meters, the car suddenly went no farther up and down and in a few seconds at a speed of over 325 km / h crashed into the ground in GDP.
The clash, which took place at an angle of about 45 degrees to the surface, and a massive explosion of fuel vapors have left seven crew members and 55 of its passengers no chance. In small fragments scattered even traditionally remained relatively intact after the fall of the engines and landing gear design.
Among the experts call crew fatigue possible causes of the disaster and its weak training. Played a role and economic component. Sending in Rostov flight loading only one-third – were transported 55 passengers instead of the 160 – company loukosterov and so worked to the point of loss. Possible care Krasnodar threatened to pay the additional take-off and landing, refueling in the “foreign” airport at a high price, accommodation in hotels of passengers by airlines, and in the future – and lawsuits against them for breach of “holiday” schedule. Given these circumstances, the pilots apparently tried in whatever it was to sit in Rostov, and fail retry landing understandably brought them out of balance.
As a result, going to the next round, the pilots may have committed some mistake. For example, relying on the autopilot, which actually has been disconnected or lost orientation in space, controlling the machine in manual mode. One way or another, but necessary in this case a smooth climb somehow turned into a rapid dive.
Meanwhile, according to other experts, the secondary care on board FZ981 circle is not much of a challenge for the crew. This is evidenced, for example, that on the night of Saturday in Rostov flew dozens of boards and many of them tried to sit safely left to alternate airports. No problem “worked” two hours before the disaster go-around from low altitude and the crew of Boeing 737-800. The fact that in his cabin all the time was a quiet, working environment, evidenced by the record of the last crew of the radio with the dispatcher. In these circumstances, as the cause of the accident experts invited to review and technical failure of the aircraft. Especially that such cases already registered in Russia and in the world. November 19, 2013 in a difficult situation were the pilots of Boeing 737-500 Norwegian Air Shuttle ASA, landing in Finland. The crew then registered the spontaneous deviation of the elevator to pitch and narrowly escaped the disaster – to make up for it, as the investigation has established, the pilots had to make a concerted effort to the wheel in the 94 kg.
The category of disputes can be attributed to the Commission’s conclusions regarding the Interstate aviakomiteta disaster Boeing 737-500, which took place at Kazan airport November 17, 2013. IAC found that the accident provoked unprofessional Boeing pilots who tried to bring the car to the second round after a failed landing attempt. The pilots, according to the commission, “did not understand its exact location” in flight, did not know how to use the “principles of integrated piloting” and were not sufficiently “psychologically mobilized.” Therefore, and went into a dive instead of climb.
Meanwhile, a member of the Technical Commission, an experienced expert Nikolai Studenikin said at the time of their disagreement with the findings of colleagues. Commenting on the parameters of the last stage of the Boeing 737-500 flight in Kazan, the expert noted that the deflection of the rudder machine height “monotonous bore systematic, uncharacteristic human capabilities.” Atypical, in his opinion, was “alternating deflection of the steering column with a tendency to dive.” And all along this indicated that there was a “disturbing factor management.” “Pulse attempts to” pilots fend off a spontaneous reduction of the machine, as suggested by the expert, “observed until the last seconds of flight.”
The reason, in his opinion, could be jammed in the drive mechanism steering Boeing height. As noted in his dissenting opinion, Mr. Studenikin, in conjunction of two removed from the wreckage drive components – the spool and sleeve – Investigators documented increased friction. A problem has occurred, possibly due to defects detected in both parts – at their surfaces, and there were risks annular burrs.
In addition, the mechanisms of steering rods, according Studenikina expert missing factory stickers, so the Commission, in his opinion, had good reason, doubt the “authenticity” of units. However, the assessment of efficiency of questionable arrangements, according to the expert, the Commission requested their manufacturer – an American company, the conclusions of which can hardly be considered objective.
With this in mind, the respondents “Kommersant” experts believe that during the investigation of the Rostov disaster is the height of the steering mechanisms Boeing should be carefully studied by independent specialists.
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