Safety Issue
The trailing bogie of wagon RCPF-31882C was found to have loose
and broken wedge wear plates. It could not be verified whether the
wedge wear plates had broken free before or during the derailment
sequence. However, if the condition had existed prior to the
derailment, it is likely that body roll induced while traversing a
series of track irregularities could result in undamped harmonic
oscillations.
ATSB safety recommendation
The Australian Transport Safety Bureau recommends that Pacific
National takes safety action to address this safety issue.