Rail safety investigations & reports

Derailment of train 1MP9, Mt Christie, South Australia, 1 September 2008

Investigation number:
RO-2008-010
Status: Completed
Investigation completed

Summary

Download Final Report
[Download  PDF: 4.22MB]
 

At approximately 2130 on 1 September 2008, 13 wagons on freight train 1MP9, owned and operated by SCT Logistics (SCT), derailed near Mt Christie, South Australia. There were no injuries, but about 4.5 km of track was damaged.

The investigation concluded that an axle-box bearing on wagon VQCY 0824U had failed and completely seized, causing the bearing journal to separate from the axle (commonly referred to as a screwed journal). Examination of the bearings suggested that inadequate lubrication had contributed to cage failure with the subsequent misalignment of the rollers and jamming of broken cage material in the rolling surfaces causing the bearing to seize. Maintenance records showed that the bearings on wagon VQCY 0824U were new in July 2004 and the wagon underwent servicing in May 2006 and May 2007. However, it is unlikely that the axle-boxes were re-greased during servicing as required by the maintenance procedures.

SCT has implemented a number of actions aimed at reducing their risk of future derailments due to axle-box bearing failures. Those actions included immediate scheduling for regreasing, a program to remove all axle-box equipped bogies from SCT's service and a trial to install on-board monitoring for hot bearings on their freight rolling stock.

Though not contributing directly to the derailment sequence, a minor safety issue was identified in relation to documented procedures at crossing loops. ARTC has proposed relevant safety action to address the issue.

Download Final Report
[Download  PDF: 4.22MB]
 
 
 
General details
Date: 01 September 2008   Investigation status: Completed  
Time: 2130 CST   Investigation phase:  
Location   (show map): Mt Christie   Investigation type: Occurrence Investigation  
State: South Australia   Occurrence type:  
Release date: 22 June 2010   Occurrence class:  
Report status: Final   Occurrence category: Accident  
  Highest injury level: None  

Train details

Train details
Train registration Train 1MP9  
Type of operation Freight Train  
Damage to train Substantial  
Departure point Melbourne  
Destination Perth  
Last update 14 November 2018