U.S. lawmakers will be focusing on why the FAA delegates some certification tasks to jet maker Boeing in lieu of doing it themselves. After back-to-back fatal crashes of Boeing’s 737 MAX jets, lawmakers will be looking at whether the automated anti-stall system was properly vetted, according to the Wall Street Journal. “There are a whole host of questions about the certification of the plane,” said House Transportation and Infrastructure Committee Chairman Peter DeFazio. “The more I learn, the more concerned I become.” Sen. Richard Blumenthal (D-Connecticut) wrote a letter to acting FAA Administrator Daniel Elwell accusing the agency of having “left the fox guarding the henhouse,” according to the paper. The FAA responded in a statement, accusing congress of forcing them to streamline some procedures. “FAA has never allowed companies to police themselves or self-certify their aircraft. The use of delegation has been a vital part of our safety system since the 1920s, and without it, the success of our country’s aviation system likely would have been stifled.”