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> The Associated Press has analysed tracking data captured by FlightRadar24 which showed the Singapore Airlines flight cruising at an altitude of 37,000 ft. Just after 8am GMT, the Boeing 777 suddenly pitched down to 31,000 ft over the span of about three minutes, the data indicates.

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2,000 fpm sounds like the pilot changing flight level to evade the turbulence, not the turbulence itself.

It wasn't even turbulence evasion, if you actually look at the flight data it's just the plane coming in to Bangkok (its diversion airport).

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