scope:

This procedure applies to you if you are involved with the management and delivery of preventative and corrective maintenance on operational signalling equipment. It does not cover equipment that is not maintained by the signal maintenance function of Network Rail.

Individual role/position responsibilities for this procedure are detailed in the RACI.

Purpose

This document details the process for the Network Rail signal maintenance function managing operational signalling equipment that has or has been suspected of causing a wrong side failure or major incident and is required to undergo an independent specialist or technical investigation to find the fundamental or root cause of the reason for the equipment failing or causing a failure.