 Improvements were also made to the internal audio systems along with minor technical improvements for drivers.The first train entered revenue service for a few hours on 30 December 2009, despite claims that train drivers were still having problems with the train, including getting the onboard passenger information display units to work, the train being taken out of service the next day.On 15 February 2010 rail operator Metro planned to reintroduce the train into service, but drivers refused to operate it, citing unresolved safety issues.