Back in 2009, SMART came up with a bonehead plan to use custom-design rolling stock — a decision heavily criticized in this blog. And here we are six years later, and they are still struggling to get something working:
On September 7, 2016, SMART was notified by SCOA [Sumitomo Corporation of America] that the failure was due to an underlying design flaw in the engine’s crankshaft. Responding to this news, SMART’s Vehicle Maintenance Superintendent, supported by LTK vehicle engineers, travelled to the Cummins Engine facility in Seymour, Indiana, and on September 14 met with Cummins, carbuilder Nippon Sharyo and SCOA. At the meeting it was agreed that the engines would be rebuilt with a new crankshaft designed for the life of the engine, as soon as possible.
So now all the engines will need to be scrapped, and the train design re-tested. The SMART staff is now (very optimistically I think) saying the line won’t open until at least Spring 2017. The previous opening date was supposed to be the end 2016 (which had already been pushed back 2 years due to other issues).
Remember: the whole rationale for using custom FRA-compliant rolling stock was that it would take “too long” to get regulatory approval for off-the-shelf European DMUs.