The plane that flew Singapore Airlines flight SQ321 sits on the tarmac at Suvarnabhumi International Airport in Bangkok on Wednesday. The plane made an emergency landing on Tuesday after experiencing severe turbulence. Photo: VCG

Rescue vehicles are parked outside the plane at Suvarnabhumi Airport in Bangkok on Tuesday. The plane is a 16-year old Boeing 777-300 delivered in February 2008, according to Planespotters' history. Photo: Guo Xiuzi/Caixin

According to data from FlightRadar 24, the plane took off from London and flew for about 11 hours before plunging sharply from an altitude of about 37,000 feet to 31,000 feet in just five minutes as it crossed the Andaman Sea and approached Thailand. Photo: FlightRadar 24

Kittipong Kittikachorn, general manager of Suvarnabhumi Airport, speaks during a news conference on Tuesday about the emergency landing of the Singapore Airlines flight. Photo: VCG

Members of a rescue team hold discussions following the emergency landing of the Singapore Airlines flight Tuesday. Photo: VCG

Emergency personnel wait for passengers outside Suvarnabhumi Airport on Tuesday. Photo: La Heng/Xinhua News Agency

Passengers of Singapore Airlines flight SQ321 greet family members upon arrival at Singapore Changi Airport on Wednesday. Photo: VCG

A sign points to the SQ321 Family Information Center in Changi Airport’s Terminal 2 on Tuesday, Photo: A Yue