9 At 21.11 on Friday 17 October, an east bound Piccadilly line train derailed shortly after leaving Hammersmith station. The train driver was not immediately aware that the train had derailed and the train was stopped by the emergency brake. One passenger pulled the Passenger Emergency alarm in the carriage and told the driver he thought that the train had derailed. However, the driver chose to disregard this. When the driver tried to move the train he realised that there were further problems as the train was not driving normally. The driver of a west bound Piccadilly Line train was able to confirm that the last carriage had derailed as he drove past.
10 This stretch of the Piccadilly Line between Acton Town and Hammersmith is maintained by Infraco SSL due to its close proximity to the District Line.
11 The westbound train driver phoned the Line Controller at Earl's Court to inform him of the derailment. The driver of the derailed train had problems with his train radio and was unable to communicate with the line controller clearly. The cause for the radio failure has not been identified but there is a PFI contract to install a new radio system throughout the Underground by December 2006. The 77 passengers were evacuated by 22.22 hours. There were no injuries.