Safety issue

Safety issue description

Drivers are desensitised to the wheel slip protection indicator light activations through its regular activation in response to momentary losses of adhesion. This, coupled with the inadequate warning provided by the TMS, may result in delayed reaction in response to activations that need driver intervention.
Issue number RO-2014-001-SI-01
Issue owner Sydney Trains
Transport function Rail: Rolling stock
Issue status Closed – Partially addressed
Date issue released 03/12/2015
Issue status justification

Considering the time since this event and that there is evidence that this was part addressed it is recommended that the status of this safety action be moved to CLOSED - PARTIALLY ADDRESSED.
Issue finalisation date 17/06/2021

Safety action

Action type Proactive action
Action number RO-2014-001-NSA-023
Organisation Sydney Trains
Action date 03/12/2015
Action description

Sydney trains advised of the following actions:

  • The generation of an awareness program for Tangara crew and RMC personnel related to the frequency and duration of wheel slip indications. The parameters of which will be determined by engineering experts.
  • The Train Operations Manual (OMET 220) as applicable to Tangara trains is reassessed for effectiveness with respect to the interpretation and management of wheel slip indications.
  • Support a review of relevant Tangara training and competence assurance methods, as well as fault rectification support mechanisms by HF Specialists, to determine the need for any improvements. The review will encompass;
    • Current Tangara Driver refresher training and competence assurance – to determine whether there is appropriate focus on fault finding with issues such as sticking brakes.
    • Documented guidance and support provided to Drivers relevant to the WSL indications and TMS alarms – to determine whether fault finding diagnostic information needs to be clarified or added to.
    • The Mechanical Control support process – to determine if we can improve the team working and decision making between Drivers and Mechanical Control relating to Tangara train faults.
  • Review the possibility of changing the TMS to provide clearer directions to reduce the likelihood of Drivers making the incorrect diagnosis of mechanical Tangara train faults. This review would be undertaken through the upcoming Tangara Technology Upgrade project, where the current TMS functions are to be provided by a replacement Train Operating System.
ATSB response

The Australian Transport Safety Bureau is satisfied that the above safety actions if completed and implemented, will address the identified safety issue. 
Action status Closed