Natural gas leaked from a defective fitting at a Pennsylvania chocolate factory where a powerful explosion leveled one building, heavily damaged another and killed seven people, federal safety investigators said Tuesday as they continued to investigate the cause of the blast.
One of two leaks at the R.M. Palmer Co. plant in West Reading was traced to a gas fitting that was installed in 1982 and was determined to have fractured, according to an investigative update released by the National Transportation Safety Board (NTSB). Investigators also determined there was a small leak on a natural gas fitting installed in 2021, the board said….