Unused bolt holes in the rail web are sufficient stress concentrators to result in the initiation and propagation of fatigue cracking, ultimately leading to the failure of the rail.
ARTC procedures for managing limit of authority over-runs by trains appear to be inconsistent with the applicable network rule as they do not mandate an immediate emergency call from the train control centre to the train crew as the first response.
There was insufficient sighting distance of the Down distant signal and insufficient distance between the Down distant signal and Down outer home signal at Gloucester to allow train 2WB3 to stop at the Down outer home signal from the permitted track speed of 70 km/h.
The Australian Transport Safety Bureau recommends that Airbus takes safety action to address the effectiveness of the mitigations to the design limitation associated with the A330 cabin pressure control systems.
Although Airservices Australia used applied operational risk assessments to high-level threats, it did not formally assess and manage the risk of specific threat scenarios. As a likely result, Airservices did not formally identify and risk manage the threat of separate aircraft concurrently carrying out the MARUB SIX standard instrument departure and a missed approach from runway 34R at Sydney Airport, even though it had been a known issue among controllers generally.
