On Friday 24 August 2004 at about 1530, locomotive DBR1199 derailed while hauling a set of empty passenger cars into Britomart Station in Auckland. The passenger cars and second locomotive were not derailed.
The derailment occurred when a tyre, which had worked loose from a wheel on DBR1199, struck the frog in a set of facing points and derailed all wheels of the trailing bogie.
The safety issue identified was the susceptibility of tyred wheels to loosen due to excessive heat.
In view of the safety actions recommended to Toll NZ Consolidated Limited by Alstom New Zealand Transport Services as a result of its internal investigation into this incident, and the subsequent actions taken by Toll NZ Consolidated Limited, no safety recommendations have been made.
