https://archive.fo/eItXw

(From the linked article, emphasis added)

Federal prosecutors have subpoenaed records from Boeing relating to the production of the 787 Dreamliner in South Carolina, where there have been allegations of shoddy work, according to two sources familiar with the investigation.

The subpoena was issued by the Department of Justice (DOJ), the sources said. DOJ is also conducting a criminal investigation into the certification and design of the 737 MAX after two deadly crashes of that jetliner.

The 787 subpoena significantly widens the scope of the DOJ’s scrutiny of safety issues at Boeing.

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It wasn’t clear if the subpoena served on the company was issued by the same prosecutors overseeing the 737 MAX investigation. But the third source, also speaking on condition of anonymity because of the confidentiality of the inquiries, said the subpoenas to employees at the South Carolina plant came from the “same group” of prosecutors involved in the 737 MAX investigation, including DOJ trial attorneys Cory Jacobs and Carol Sipperly in the Fraud Section.

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The grand-jury investigation into the MAX has been cloaked in secrecy, but some of the Justice Department’s activities have become known as prosecutors issued subpoenas for documents. The Department of Transportation’s Inspector General and the FBI are working with the DOJ.

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While there are differences in the 737 and 787 matters, prosecutors are likely looking into whether broad cultural problems run throughout the company, according to the third source and a person in South Carolina, who also spoke on condition of anonymity because of the sensitive nature of the matter.