It said the flight operated as normal until it probably flew over an area of “developing convective activity” while passing over the south of Myanmar at 37,000ft (11,300m).
“The rapid changes in G over the 4.6 seconds duration resulted in an altitude drop of 178ft (54m), from 37,362ft to 37,184ft,” the TSIB report said.
“This sequence of events likely caused the injuries to the crew and passengers.
“After the pilots were informed by the cabin crew that there were injured passengers in the cabin, the decision was made to divert to Suvarnabhumi Airport, Bangkok, Thailand.”
Approximately 17 minutes after the turbulence event, the pilots were able to make a “controlled descent from 37,000ft”, the report said, adding the aircraft did not encounter any more severe turbulence during its diversion to Bangkok.
The pilots also requested for medical services to meet the aircraft on arrival.
TSIB, which operates under Singapore’s transport ministry, said its investigations were ongoing.
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