Serious incident to the Airbus A330 registered 9M-XXS occured on 05/03/2017 at Vietnam [Investigation led by AIB - Malaysia] - BEA - Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile

Preliminary data based on the notification from the authorities of Malaysia

During cruise at FL390, aircraft encountered severe turbulence. Autopilot and AutoThrust disconnected and Captain took over control. Subsequently, a PAN call was made to Ho Chi Minh control due to the strong updraft encountered. As aircraft recovered, pilots requested climb back to FL390. Pilots were directed to point MAPNO and the PAN call was cancelled. Captain was informed by Purser that five passengers were reported injured during the event. Cabin Crew managed to page for medical personnel onboard to attend to the injured passengers.

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General information
Local date	03/05/2017
Responsible entity	Malaysia - AIB
State or area of occurrence	Vietnam
Location	En croisière, FL390
Human consequences	Minor
Number of minor injuries	5
Aircraft consequences	None
Occurrence class	Serious incident
File number	BEA2017-0401

Flight Information
Aircraft category	Aeroplane
Operator	Malaysia - Airasia X Sdn Bhd
Manufacturer / Model	AIRBUS - A330
Aircraft Registration	9M-XXS
State of registry	Malaysia
Last departure point	Taiwan - RCTP (TPE): Taibei City/Taibei Intl Ap
Planned destination	Malaysia (Peninsular) - WMKK (KUL): Kuala Lumpur/Intl
Flight phase	En route
Serial number	1533
Operator Type AG
Operation Type	Commercial Air Transport - Passenger - Airline

BEA is the French air safety investigation authority for civil aviation. The sole objective of the investigation is to improve air safety. It is intended neither to apportion blame nor to assess responsiblity.