Section 21 (2) of the Transport Safety Investigation Act
2003 (TSI Act) empowers the Australian Transport Safety Bureau
(ATSB) to discontinue an investigation into a transport safety
matter at any time. Section 21 (3) of the TSI Act requires the ATSB
to publish a statement setting out the reasons for discontinuing an
On 12 October 2011, the ATSB commenced an investigation into the breakdown of separation, between an Airbus Industrie A320 aircraft registered VH-VGR and a Boeing Company 737 aircraft registered VH-VOD near Melbourne Airport, Vic. Examination of the information collected during the investigation identified that the occurrence had significant similarities to aspects of ongoing investigation AO-2010-104, breakdown of separation, between a Boeing Company 767 aircraft registered VH-OGU and a Boeing Company 737 aircraft registered VH-VBH, near Melbourne Airport, Vic on 5 December 2010.
Accordingly, the ATSB decided to examine the 12 October 2011, breakdown of separation event as part of the broader investigation AO-2010-104 and the separate AO-2011-131 investigation was discontinued.