Too many nuts removed from Northland power pylon - report

Human error caused the disastrous incident that cut power to tens of thousands of people in Northland and cost an estimated $60 million. The investigator's report says the inexperienced work crew removed all the nuts from three of the four base plates securing the legs of the pylon to the floor so they could be sandblasted. It found it likely that the workers, from Transpower contractor Omexom, had likely done this while doing refurbishment work on other pylons. Transpower grid delivery manager Mark Ryall speaks to Susana Lei'ataua.