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Turbulence on the plane from London to Singapore. Preliminary report – findings

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Singapore's Transport Safety Investigation Bureau has published its preliminary findings into last week's incident on board a Singapore Airlines Boeing 777-300ER flight from London. They show that the machine in 4.6 seconds. it changed its height by 54 meters.

The report with the preliminary findings of the Singapore Transport Safety Investigation Bureau (TSIB) was published on Wednesday, May 29, on the official website of the Ministry of Transport. The data was obtained from the flight data recorder and the recording of conversations in the cockpit.

In the findings, the document indicates the exact time of key moments of the investigated flight SQ321. As we read, on May 21 at 07:49:21 UTC (9:49 Polish time) the plane flew over the southern Burma at an altitude of 37,000 feet and probably over an area of ​​developing convective activity. Then a slight vibration began to be felt. There was an unintentional increase in the aircraft's altitude and the autopilot responded by leveling it to the set altitude. At. 7:49:32 the pilot can be heard saying that the seat belt warning has been activated. After a few seconds dramatic events took placewhich ended with the death of one person (a suspected heart attack) and injuries to dozens of others.

SEE ALSO: “This was supposed to be their last big vacation.” What do we know about the Boeing passenger who died as a result of turbulence

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Turbulence on board the plane from London to Singapore. Preliminary findings

“At 07:49:40 (UTC) the plane experienced a sudden change in G (overload), (…). This probably caused the passengers who were not wearing seat belts to become airborne,” we read. A second later, another change caused the airborne passengers to fall. “The rapid changes in G over a period of 4.6 seconds resulted in a drop in altitude of 178 ft (approx. 54 m), from 37,362 ft to 37,184 ft. This sequence of events likely resulted in injuries to the crew and passengers.”

Investigators note that during these changes, the pilots tried to stabilize the plane by turning off the autopilot. They manually operated the machine for 21 seconds. After being informed by the cabin crew that there were injured passengers in the cabin, the decision was made to divert the aircraft to Suvarnabhumi Airport in Thailand. On the way to Bangkok, the pilots asked for medical assistance.

There were 211 passengers and 18 crew members on board the plane. After landing, passengers on a flight from London to Singapore they described dramatic moments to journalistswhen the plane hit turbulence. Many of them were sleeping or eating breakfast at that time, and everything happened so quickly that they did not have time to fasten their seat belts. – Suddenly I felt the plane starting to fall. People were screaming. I remember flying pillows, cups and plates, says Andrew Davies, a passenger.

Bangkok airport and ambulances that arrived to pick up passengers from a Singapore Airlines flight from LondonRUNGROJ YONGRIT/EPA

The investigation is ongoing. In addition to TSIB investigators, the team investigating the incident included representatives of the US National Transportation Safety Board (NTSB), the Federal Aviation Administration (FAA) and Boeing. Singapore Airlines, cited by Reuters, said on Tuesday evening that 42 passengers were still in Bangkok, of whom 26 were still hospitalized.

SEE ALSO: Dangerous “clear sky” turbulence. What are they and when do they occur?

Main photo source: Reuters, Dzafran Azmir

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