Safety action taken: Following the incident, the team lead electrician proposed a new procedure to check the in-field equipment wiring with the master circuit diagram during the planning process, before work commences. Queensland Rail subsequently introduced a new procedure, MD-18-366 GSS Part 13D Correlation of Signalling Records, to correlate the wiring as early as possible before installation.
Part 2.2 notes:
The prime causes for poor correlation between records and the physical wiring and equipment on site are:
• Inadequate record control when the original works were installed;
• Site equipment or wiring that has been altered without the corresponding source records being updated;
• Multiple schemes at the same location that have been installed in a different order to that for which they were designed;
• Works installed but never commissioned.