Jump to Content
Download Final report
[ Download PDF: 1.32MB]
 
 
 

What happened

At about 1925 CDT[1] on 23 December 2014, GWA train 2AD1 derailed near Hugh River, Northern Territory. The derailment resulted from an axle bearing failure on wagon PTMY 6-T. The wagon, carrying distillate fuel, remained upright and there was some minor damage to the track (sleepers and rail clips). There were no injuries.

What the ATSB found

The ATSB found that the journal and bearing on wagon PTMY 6-T had seized and lost interference fit – generating high levels of frictional heating between the bearing and axle journal, and the subsequent torsional shearing failure of the axle (a ‘screwed journal’). The axle failure immediately caused the leading axle of the trailing bogie to derail.

On the balance of the available evidence, the ATSB concluded that a loss of lubrication or an internal bearing cage failure was the most likely contributor to the bearing breakdown and seizure. Evidence also suggested the breakdown developed relatively rapidly, given the absence of a positive fault detection from two bearing acoustic monitoring systems (RailBAM®) passed on the day of the occurrence.

Safety message

Bearing failures leading to derailment continue to occur within the Australian rail network. Rail operators must continue to be vigilant and ensure axle bearings, and in particular axle box type bearings, are correctly installed, maintained and monitored throughout their life.

 Train 2AD1 near Hugh River, NT

 Train 2AD1 near Hugh River, NT

Source: Genesee Wyoming Australia Pty Ltd 

__________

  1. Central Daylight Time (ACDT), UTC +10.5 hours
Download Final report
[ Download PDF: 1.32MB]
 
 
 

The occurrence

Context

Findings

Additional safety action

Sources and submissions

 
 
 

To download an image click the download link then right-click the image and select save image as.

Copyright in material obtained from other agencies, private individuals or organisations, belongs to those agencies, individuals or organisations. Where you want to use their material you will need to contact them directly.

 
General details
Date: 23 December 2014 Investigation status: Completed 
Time: 1925 CST Investigation type: Occurrence Investigation 
Location   (show map):near Hugh River  
State: Northern Territory  
Release date: 07 December 2015 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Train details
Line operator: Genesee & Wyoming Australia 
Train operator: Genesee & Wyoming Australia 
Train registration: 2AD1 
Type of operation: Freight 
Sector: Freight 
Damage to train: Minor 
Departure point:Adelaide, SA
Destination:Darwin, NT
 
 
 
Share this page Provide feedback on this investigation
Last update 23 December 2016