ATSB is investigating a stick-shaker activation on a B744 flight to Hong Kong.
The ATSB is investigating a stick shaker activation involving a Qantas Boeing 747, VH-OJU, 110 km SE of Hong Kong (BETTY IFR), on 7 April 2017.
While holding at flight level 220, the flight crew received a stick shaker activation and detected airframe buffeting. The flight crew disconnected the autopilot and manoeuvred the aircraft in response. Fifteen passengers received minor injuries.
http://www.atsb.gov.au/publications/...r/ao-2017-044/
QF has said it was turbulence.