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XPT tail pin acceptance

Issue number: RO-2011-012-SI-01
Who it affects: Operators of trains with this arrangement of tail pin
Issue owner: RailCorp
Operation affected: Rail: Passenger - regional
Background: Investigation Report RO-2011-012
Date: 19 April 2013

Safety issue description

RailCorp’s acceptance testing regime for tail pins did not identify that the tail pins stamped BU 06 04 were below standard and, hence, not suitable for service.

Proactive Action

Action organisation: RailCorp
Action number: RO-2011-012-NSA-019
Date: 19 April 2013
Action status: Closed

RailCorp has revised the engineering drawing for the XPT tail pin. The drawing now specifies forged components and states that; Charpy, tensile strength, chemical composition, surface finish, hardness tests, and quality control testsare required. Additionally, RailCorp hascommenced fatigue, fracture mechanics and fracture toughness tests on the new forged tail pins to determine
theperiod at which mandatory tail pin replacement should occur.

   
Current issue status: Adequately addressed
Status justification: The ATSB is satisfied that the action taken by RailCorp to improve their acceptance procedure addresses this safety issue.
 
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Last update 08 January 2014