The ATSB is investigating a ground handling event involving a Malaysia Airlines Airbus A330.
On 31 March 2016, at about 0100 Eastern Daylight-saving Time1, an Airbus A330, registered 9M-MTB and operated by Malaysia Airlines, was being prepared for departure at Melbourne Airport, Victoria.
During passenger boarding, the aircraft rolled rearwards from the gate about 2-3 m. The aerobridge and the aircraft’s forward left door were damaged. There were no reported injuries.
http://atsb.gov.au/publications/investigation_reports/2016/aair/ao-2016-028/