At 1130 on 1 October 2017, 11 wagons derailed on a Pacific National loaded wheat service. At the time the train was heading south on a single line between Narromine and Parkes, near Narwonah (537 km). The train consisted of 2 locomotives and 23 wagons. The 12th to the 22nd wagon in the consist derailed, with 9 derailed wagons on their side and 2 wagons remained upright. The last wagon, the 23rd wagon, did not derail. There were no injuries but there was substantial damage to 9 wagons and track infrastructure.
The ATSB has commenced an investigation into this accident, which will be undertaken by officers from the NSW Office of Transport Safety Investigations, under the provisions of the Transport Safety Investigation Act 2003. Investigators have commenced collecting evidence and statements from involved parties, which will be analysed and a draft investigation report compiled. The draft report will be forwarded to relevant parties for comment prior to the completion and release of the final report.