On 5 September 2013, the Australian Transport Safety Bureau (ATSB) released its final investigation report into the loss of control involving Eurocopter1 AS350BA, registered VH RDU, which occurred 93 km north of Rockhampton Airport, Queensland on 8 September 2011. Subsequently, the ATSB became aware of new and significant evidence in relation to the helicopter’s hydraulic pump drive system, including the associated drive belt. Information had been provided through the ATSB’s confidential reporting scheme (REPCON) indicating the reporter’s safety concerns about the hydraulic pump drive belt. As a result, and in accordance with clause 5.13 of Annex 13 to the Convention on International Civil Aviation Aircraft Accident and Incident Investigation, the ATSB reopened the investigation.

This supplementary report highlights the additional information gained as a result of reopening the investigation and confirms that the drive belt that was installed in VH-RDU at the time of the accident was authorised for use and within its service life limit. Review and analysis of the additional information determined that, while it would be beneficial to add some additional information to the final investigation report, no change was necessary to the findings in the report that was released to the public on 5 September 2013.