Discontinued Investigation
Statement of Reasons
Occurrence investigations commenced from 1 July 2003 are
initially categorised as category 4 unless agreed by the ATSB
Executive to be above this level at the outset. As detailed in
Section 21 (2) of the TSI Act 2003, the Executive Director in
empowered to discontinue an investigation at any time. Section 21
(3) of the TSI Act 2003 requires the Executive Director to publish
a statement setting out the reasons for discontinuing an
investigation (commenced from 1 July 2003) within 28 days of
discontinuing the investigation.
Preliminary investigation was undertaken into a level 4
occurrence involving a landing B747 aircraft and an aircraft tug
that crossed the runway at Sydney Airport on 11 August 2006. Safety
action relevant to this occurrence has been taken in response to an
earlier incident of a similar nature. Details of that safety action
are contained in ATSB safety investigation report 200505170,
published on 6 December 2006 and available on the ATSB website.
Given the safety action already taken,there was limited safety
benefit in continuing the 11 August 2006 investigation compared
with other priorities.
Status: Downgraded the occurrence to level 5
and investigation discontinued.