 The trains were delivered late , and were put into service after the Norwegian Railway Inspectorate had given dispensation from parts of the safety regulation . On 17 June 2000 , a train derailed at Nelaug Station after an axle broke . The class was grounded for a month , and the investigation showed both design errors , and lack of proper inspection and testing . After they were put back into service , they were not allowed to use the tilting mechanism — thus not being allowed to run faster than their predecessors . The construction was reinforced , and in 2004 , the tilting mechanism was re @-@ enabled along with higher speeds . In 2007 , a train derailed on the Bergen Line , and questions were raised about the trains ' ability to operate in snow , however the accident report showed that the trains ' front axle load was just as able to cope with heavy snow conditions as the locomotives running on the line , and that the derailment would have been more severe if the same conditions would hit a normal train with less secure connections between carriages . On 16 June 2011 , two units were destroyed when the train ran into a fire in a snow tunnel at Hallingskeid Station . 
