вЂњSo why the anomaly occurred in the throttle, which components caused it, we still cannot determine,вЂќ he said. The auto-throttle itself receives input from 13 aircraft components, he added, any of which could have contributed to the problem. In addition, there are many airline systems that can affect the enginesвЂ™ thrust. Nurcahyo said there was no clear evidence that it malfunctioned on this flight. At 10,600 feet, the differential between the thrust of the two engines may have caused the plane to start rolling to the left, the report said.Дespite the problems with the planeвЂ™s auto-throttle on earlier flights, Mr. The auto-throttle system on the Sriwijaya aircraft had malfunctioned twice in the weeks before the crash and had been fixed after both incidents, the planeвЂ™s repair records show.ДЇlight data indicate that when the aircraft reached an altitude of 8,150 feet during the fatal flight, the thrust lever for the left engine was reduced while the right engineвЂ™s thrust lever remained unchanged. The auto-throttle uses data entered by the pilot to automatically regulate the two levers in the cockpit that control the thrust of the engines. In the event of an auto-throttle malfunction, it is typical for a pilot or co-pilot to simply turn the system off. One focus of the investigation has been the auto-throttle, which is a system that controls the thrust of a planeвЂ™s engines and is separate from the autopilot function. The crash killed all 62 people aboard, including six active crew members.

9 from Soekarno-Hatta International Airport in Jakarta, the Indonesian capital. The Boeing 737-500 crashed minutes after taking off on Jan. We still cannot explain if there was an auto-throttle malfunction.вЂќ вЂњWhat are the problems? We cannot answer that yet. вЂњWhat happened? We donвЂ™t know,вЂќ he said after the 31-page preliminary accident report was released by IndonesiaвЂ™s National Transportation Safety Committee. Many questions remain unanswered, including why the pilot and co-pilot were unable to recover control of the plane before it plummeted more than 10,000 feet in less than a minute, said Nurcahyo Utomo, chief of the investigation team. It is not clear, at this point, why that problem may have occurred during the Sriwijaya flight.

They are assessing information from the flight data recorder and the planeвЂ™s maintenance records, but searchers have not recovered the cockpit voice recorder, which would tell them what the pilots were saying in their final minutes.ДЄ difference in the level of thrust - the force of the engines that propels the aircraft forward - can make planes difficult to control. BANGKOK - A preliminary investigation into the crash in Indonesia last month of Sriwijaya Air Flight 182 has found that a difference in the level of thrust between the planeвЂ™s two engines may have contributed to the aircraft rolling over before it plunged into the Java Sea, investigators said Wednesday.ДЄs in most crashes, the investigators are looking at a range of factors that may have contributed to the cause.

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