The ATSB is investigating a train parting and subsequent parted wagons occupying an unprotected track section, involving freight train 3PG1, about 90 km west of Ivanhoe, NSW, on 2 October 2020.

At about 1230, freight train 3PG1 lost brake pipe air and stopped at about 904 track km, 90 km west of Ivanhoe. The crew restored the brake pipe air and the train continued its journey to Ivanhoe where it was discovered that four wagons were missing from the train. The wagons were subsequently found at 906.5 track km.

The ATSB investigation is continuing and is currently in the final stages of the evidence examination and analysis phase. To date, the ATSB has:

• interviewed the train crew and network controller
• conducted analysis of data from the locomotive’s event recorder
• reviewed recorded communications between train control and the crew
• reviewed the track access and labour agreements in place between the involved parties
• reviewed the experience, training and competencies held by the train crew
• conducted analysis of possible contributors to the parting, including review of wagon inspection results, and maintenance history
• analysed the practical actions required, including actioning applicable rules and procedures, when train crews respond to a loss of brake pipe air event
• reviewed the tasks conducted post-occurrence to recover the lost wagon.

Due to the complexity of the investigation, and potential for safety factors to be identified, the investigation scope has been expanded to defined. A report will be published at the conclusion of the investigation. However, should any critical safety issues be identified at any stage during the course of the investigation, the ATSB will immediately notify relevant parties so appropriate safety action can be taken.

The ATSB is investigating a train parting and subsequent loss of wagons involving freight train 3PG1, about 90 km west of Ivanhoe, NSW, on 2 October 2020.

At about 1230, freight train 3PG1 lost brake pipe air and stopped at about 904 track km, 90 km west of Ivanhoe. The crew repaired an air leak and the train continued its journey to Ivanhoe where it was discovered that four wagons were missing from the train. The wagons were subsequently found at 906.5 track km.

The evidence collecting phase of the investigation will include interviewing the parties involved and gathering relevant operational information including recorded data.

Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify relevant parties so appropriate safety action can be taken.

A final report will be released at the conclusion of the investigation.