December 15, 2017 6:50 pm

Equipment Malfunction Caused Massive SF Blackout

We’re learning more about what caused a massive blackout in San Francisco in April. A company hired by PG&E to investigate the incident concluded that the problems involved equipment failure at an electrical substation and a flawed design of a critical alarm system. Investigative Reporter Liz Wagner reports in a story that aired on Dec. 15, 2017.

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