The federal judge overseeing Pacific Gas & Electric's probation related to the 2010 San Bruno pipeline explosion issued a preliminary finding on Thursday concluding the utility's equipment was a factor in sparking wildfires in 2017 and 2018 that devastated parts of Northern California.The ruling could lead to additional scrutiny or oversight for the utility, which announced Jan. 14 that it would file for bankruptcy protection due to mounting wildfire liabilities. U.S. District Judge William Alsup gave PG&E and the U.S. Justice Department until Jan. 23 to reply to concerns that uninsulated PG&E equipment caused "electrical sparks [to] drop into the vegetation below," creating "an extreme danger of igniting a wildfire."