Safety Issue
A horizontal misalignment of the slots in the coupler, yoke and
draft sill allowed the coupler to grab the draft key and move it
laterally applying a heavily biased lateral force to the draft key,
anti-wear collar and retainer pin. These forces ultimately resulted
in the retainer pin split pin failing, the retainer pin dislodging,
the draft key dislodging and then the coupler pulling out of the
wagon.
Safety Recommendation
The Australian Transport Safety Bureau recommends that the
Chicago Freight Car Leasing Australia take action to address this
safety issue.