The Australian Transport Safety Bureau has completed its investigation into an incident at Goulburn which resulted in the derailment of five freight train wagons.
Back in March last year, SCT Logistics freight train 7MB9 was exiting a refuge loop when the wagons derailed and obstructed both the up and down main lines.
The ATSB found the wagons had derailed due to a broken rail, which had likely broken under the previous train.
The break, which had probably caused the signal to be stuck at stop, had gone undetected.
Deputy Chief Investigator Kevin Kitchen says it's critical that areas of the rail that can't be easily inspected during scheduled continuous ultrasonic testing are tested thoroughly at the time of welding to ensure that the weld is free from defects.
The full report can be found at: https://www.atsb.gov.au/media/news-items/2020/undetected-track-failure/