6 June 2018
Transport Safety Bureau has released the final investigation report into a
train parting and derailment at Parkville, NSW, 6 April 2016.
The ATSB’s final investigation report into a train parting and derailment at Parkville, NSW underlines the importance of train maintenance systems identifying and removing all non-compliant componentry.
A Pacific National (PN) grain train separated on the Main North Line on 6 April 2016, when a draftgear component fractured on its fifth wagon, causing the yoke pin to fall out and the coupler shank disengaging. The coupler shank fell onto the track and damaged the underbelly discharge doors on 10 wagons as the train continued along the track. The trailing wheelset on the thirteenth wagon was then derailed and travelled 45 metres, causing damage to track sleepers before it came to a stop.
The ATSB investigation found the draftgear component was of an earlier design and susceptible to fatigue failure and was not identified and removed during a previous PN maintenance programme to remove this type of non-compliant component.
The ATSB report highlights that when a non-compliant component is identified all such units need to be located and replaced.
Investigation Report: Grain train 5422N parting and derailment, Parkville, NSW on 6 April 2016