Axle testing on wheelset number 7E5S 831444 was not carried out during the two most recent wheelset maintenance events in January 2016 and November 2016. It is likely the axle crack existed at the time of these maintenance activities.
ATSB is satisfied that the actions taken by Pacific National have addressed the safety issue.
Pacific National issued a Rolling Stock Notice to reinforce to Pacific National’s wheel set overhaul contractors of the requirement to conduct non-destructive testing. Following this incident Pacific National commenced and completed a program of non-destructive testing.