Preliminary report released 19 March 2012
At approximately 05:451 on 23 October 2011, train 7SP5 was passing through Wirrinya on the main line of the Stockinbingal to Parkes Railway. Soon after, the driver noted that the train was losing air and brought the train to a stop. An inspection found that the rear portion of the train had derailed. There was significant damage to the last six wagons of the train, approximately 1 km of track, and several shipping containers. Up to 17 km of track suffered minor damage.