Pacific National’s inspection processes did not identify key structural points for inspection on RRYY class wagons, including the susceptibility to cracking in the junction between container loading outriggers, pull rod boxed opening, and the bottom centre sill sections. This reduced the likelihood of cracks being detected.
The ATSB is satisfied that the action taken by Pacific National will ensure that maintenance inspections and train examinations will be directed to key areas of the RRYY wagon design that are susceptible to cracking.
Immediately following this accident, Pacific National issued a Rolling Stock Notice in relation to its RRYY class wagon fleet. The notice required that:
Since this initial response, Pacific National has also completed the following proactive safety actions: