ACCIDENT – Singapore 777-300ER Diverts After Fatal Turbulence

The crew of a Singapore Airlines 777-300ER had to divert after severe turbulence caused one fatality and several injuries to those on board.

This accident happened on Tuesday the 21st of May. It involved Singapore Airlines flight SQ-321, departing from London Heathrow Airport (EGLL) in the UK. The flight’s destination was Singapore’s Changi Airport (WSSS). This is a daily service, departing from London at 10:05 PM.

The accident aircraft. Photo: N509FZ, CC BY-SA 4.0

On the day of this turbulence accident, the Singapore flight departed from London with a half-hour delay, using runway 09R. There were 211 passengers and 18 crew members on board. The flight’s departure appeared routine, initially leveling off at FL310 for their cruise.

As the aircraft became lighter, its crew climbed to FL370. The turbulence accident seemed to occur just over 10 hours into the flight, as the Singapore 777-300ER was flying over Myanmar. Singapore Airlines confirmed that there was a fatality and several injuries in the event.

The incident aircraft in an older photo, with a regular Singapore Airlines livery. Photo: John Taggart, CC BY-SA 2.0

Singapore Flight Lands After Severe Turbulence Event

At this time, it isn’t clear if the fatality and injuries involve both passengers and crew. In any case, the flight crew decided to divert to Bangkok Suvarnabhumi Airport (VTBS) in Thailand, initially descending to FL310.

The Singapore flight landed on runway 19R about 45 minutes after diverting. Medical crews were on standby for the accident flight, with several ambulances. The flight taxied to a remote stand near the waiting crews in Bangkok.

Photo: elisfkc, CC BY-SA 2.0

The Singapore flight likely experienced a clear air turbulence event. In some cases, it is also possible for wake turbulence from other airliners to affect an aircraft. These aren’t always easy to predict, especially between crossing airways, as disturbed air from one aircraft descends and expands slowly.

While situations like these are rare, airline crews always tell passengers to wear their seatbelts when seated because of the possibility for such events to happen. The belts don’t need to be very tight, but they need to be fastened.

The aircraft in this incident is a sixteen-year-old Boeing 777-300ER, with registration 9V-SWM. In previous years, the airline temporarily converted its interior for use as a freighter. It was returned to regular passenger service, with seats for 264 people, at the end of April this year.

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