An investigation is underway after a serious mid-air incident involving a Qantas jet where 15 people were injured after a "stick shaker" warning.
The incident unfolded about 110km south east of Hong Kong, after flight QF29 took off from Melbourne.
While at 22,000 feet pilots reported feeling "airframe buffeting"- a warning the plane might stall, and flight crew received what is known as "stick shaker activation", a device which causes the aircraft's control stick to vibrate loudly to warn the pilot of an imminent stall.
The Australian Transport Safety Bureau (ATSB) is investigating the incident after classifying it as serious, and said a report would be released within several months after flight crew were interviewed.
The report stated the flight crew disconnected the autopilot and manoeuvred the aircraft in response.
Fifteen passengers received minor injuries.
It's understood the incident lasted around two minutes, and while the flight landed normally in Hong Kong, an ambulance met passengers as a precaution, with one person taken to hospital for assessment.
A Qantas spokeswoman said customers experienced "unexpected in-flight turbulence" during the trip.
She said their team along with the ATSB are reviewing the event.